Annual report pursuant to Section 13 and 15(d)

Income Taxes - Reconciliation between Federal Statutory Income Tax Rate and Effective Tax Rate (Detail)

v2.4.0.8
Income Taxes - Reconciliation between Federal Statutory Income Tax Rate and Effective Tax Rate (Detail)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Income Tax Disclosure [Abstract]      
Federal statutory income tax rate 35.00% 35.00% 35.00%
State taxes, net of federal tax benefits 4.37% 0.03% 0.00%
Tax-exempt municipal securities (0.16%) (0.32%) (0.26%)
Tax credit-federal (1.41%) (2.10%) (2.97%)
Other (2.17%) (2.16%) (0.80%)
Valuation allowance 0.00% 140.59% 28.50%
Effective tax rate 35.63% 110.14% 2.47%