Quarterly Financial Data (Unaudited) - Summary of Quarterly Financial Data (Detail) - USD ($) $ / shares in Units, $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2014 |
Dec. 31, 2015 |
Sep. 30, 2015 |
Jun. 30, 2015 |
Mar. 31, 2015 |
Dec. 31, 2014 |
Sep. 30, 2014 |
Jun. 30, 2014 |
Mar. 31, 2014 |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
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| Quarterly Financial Information Disclosure [Abstract] | ||||||||||||
| Interest and dividend income | $ 41,714 | $ 40,025 | $ 41,050 | $ 41,437 | $ 41,462 | $ 34,562 | $ 30,343 | $ 30,367 | $ 164,226 | $ 136,734 | $ 119,140 | |
| Interest expense | 4,130 | 4,040 | 3,958 | 3,981 | 4,106 | 3,475 | 3,183 | 3,269 | 16,109 | 14,033 | 13,507 | |
| Net interest income before provision for loan losses | 37,584 | 35,985 | 37,092 | 37,456 | 37,356 | 31,087 | 27,160 | 27,098 | 148,117 | 122,701 | 105,633 | |
| (Negative provision) provision for loan losses | (3,835) | (3,704) | (2,403) | (1,672) | 1,312 | (60) | (3,902) | (3,608) | (11,614) | (6,258) | 576 | |
| Non-interest income | 12,056 | 13,561 | 11,135 | 10,850 | 8,984 | 21,611 | 5,487 | 6,214 | 47,602 | 42,296 | 27,900 | |
| Non-interest expense | 28,186 | 28,723 | 27,028 | 31,391 | 36,799 | 25,590 | 18,174 | 18,108 | 115,328 | 98,671 | 70,441 | |
| Income before provision for income taxes | 25,289 | 24,527 | 23,602 | 18,587 | 8,229 | 27,168 | 18,375 | 18,812 | ||||
| Provision for income taxes | 10,460 | 10,569 | 9,619 | 7,534 | 2,301 | 5,368 | 6,866 | 7,844 | 38,182 | 22,379 | 22,732 | |
| Income from continuing operations, net of taxes | 14,829 | 13,958 | 13,983 | 11,053 | 5,928 | 21,800 | 11,509 | 10,968 | 53,823 | 50,205 | 39,784 | |
| Income (loss) from discontinued operations | $ (444) | 0 | 0 | 0 | 0 | 0 | 0 | (467) | 23 | 0 | (444) | 73 |
| Net Income | $ 14,829 | $ 13,958 | $ 13,983 | $ 11,053 | $ 5,928 | $ 21,800 | $ 11,042 | $ 10,991 | $ 53,823 | $ 49,761 | $ 39,857 | |
| Basic earnings per share: | ||||||||||||
| Income from continuing operations, net of taxes (in usd per share) | $ 0.46 | $ 0.44 | $ 0.44 | $ 0.35 | $ 0.19 | $ 0.69 | $ 0.36 | $ 0.34 | $ 1.69 | $ 1.58 | $ 1.26 | |
| Loss from discontinued operations, net of taxes (in usd per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | (0.01) | 0.00 | 0.00 | (0.01) | 0.00 | |
| Basic earnings per share (in usd per share) | 0.46 | 0.44 | 0.44 | 0.35 | 0.19 | 0.69 | 0.35 | 0.34 | 1.69 | 1.57 | 1.26 | |
| Diluted earnings per share: | ||||||||||||
| Income from continuing operations, net of taxes (in usd per share) | 0.46 | 0.44 | 0.44 | 0.35 | 0.19 | 0.68 | 0.36 | 0.34 | 1.68 | 1.57 | 1.26 | |
| (Loss) income from discontinued operations, net of taxes (in usd per share) | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | 0.00 | (0.01) | 0.00 | 0.00 | (0.01) | 0.00 | |
| Diluted earnings per share (in usd per share) | $ 0.46 | $ 0.44 | $ 0.44 | $ 0.35 | $ 0.19 | $ 0.68 | $ 0.35 | $ 0.34 | $ 1.68 | $ 1.56 | $ 1.26 | |
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- Definition Provision (Negative Provision) For Loan, Lease, And Other Losses No definition available.
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- Definition Per basic share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation. No definition available.
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- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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- Definition Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition This element represents the income or loss from continuing operations attributable to the economic entity which may also be defined as revenue less expenses and taxes from ongoing operations before extraordinary items, and noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) from continuing operations per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The amount of net income (loss) derived from continuing operations during the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount after tax of income (loss) from a discontinued operation including the portion attributable to the noncontrolling interest. Includes, but is not limited to, the income (loss) from operations during the phase-out period, gain (loss) on disposal, gain (loss) for reversal of write-down (write-down) to fair value, less cost to sell, and adjustments to a prior period gain (loss) on disposal. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Per diluted share amount, after tax, of income (loss) from the day-to-day business activities of the discontinued operation and gain (loss) from the disposal of the discontinued operation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Represents the total of interest and dividend income, including any amortization and accretion (as applicable) of discounts and premiums, earned from (1) loans and leases whether held-for-sale or held-in-portfolio; (2) investment securities; (3) federal funds sold; (4) securities purchased under agreements to resell; (5) investments in banker's acceptances, commercial paper, or certificates of deposit; (6) dividend income; or (7) other investments not otherwise specified herein. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of the cost of borrowed funds accounted for as interest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The net amount of operating interest income (expense). Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The portion of profit or loss for the period, net of income taxes, which is attributable to the parent. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Total aggregate amount of all noninterest expense. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- References No definition available.
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