XML 90 R75.htm IDEA: XBRL DOCUMENT v3.3.1.900
Investment Securities - Proceeds from Sale, Gross Gains (Losses) Realized on Sales, Maturities and Other-Than-Temporary Impairment Charges Related to Securities Available for Sale (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]      
Proceeds from sale $ 88,054 $ 132,868 $ 671
Sales Transactions:      
Gross gains 0 291 233
Gross losses (284) (243) 0
Total gain (losses) from sales transactions (284) 48 233
Maturities, calls and impairment:      
Gross gains 131 502 4
Gross losses 0 0 (1,395)
Other-than-temporary impairment 0 0 0
Total gain (losses) maturities and impairment 131 502 (1,391)
Net gains (losses) and impairment $ (153) $ 550 $ (1,158)