Annual report pursuant to Section 13 and 15(d)

Accounting for Investments in Qualified Affordable Housing Projects - Additional Information (Detail)

v3.3.1.900
Accounting for Investments in Qualified Affordable Housing Projects - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Jan. 01, 2012
Accounting Changes and Error Corrections [Abstract]        
Cumulative effect of retrospective application of accounting principle       $ 1,100
Decrease in net income   $ 49 $ 50  
Impairment of investments $ 0 0    
Investment in low income housing 18,900 21,300    
Unfunded commitments on low income housing 5,700 11,900    
Income tax expense 2,300 1,600    
Tax credit and other benefit received from tax expenses $ 3,300 $ 2,300