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Share-Based Compensation (Details Textual) (USD $)
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3 Months Ended | 6 Months Ended | 12 Months Ended | |||
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Jun. 30, 2012
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Mar. 31, 2012
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Jun. 30, 2011
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Jun. 30, 2012
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Jun. 30, 2011
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Dec. 31, 2011
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| Share-Based Compensation (Textual) [Abstract] | ||||||
| Share-based compensation expense | $ 10,000 | $ 69,000 | $ 102,000 | $ 382,000 | ||
| Amount of tax benefits | $ 4,000 | $ 29,000 | $ 43,000 | $ 161,000 | ||
| Intrinsic value represents the excess of the closing stock price related to options outstanding | $ 10.12 | $ 10.48 | $ 7.40 | |||
| Number of options exercised | ||||||
| X | ||||||||||
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- Definition
Closing price of common stock. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of share options (or share units) exercised during the current period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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