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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Statement Of Income And Comprehensive Income [Abstract]    
Net income $ 5,006 $ 14,044
Unrealized gains (losses) on securities:    
Unrealized holding gains (losses) arising during the period 1,456 988
Reclassification of amount realized through sale of securities (5)  
Tax effect (540) (368)
Total other comprehensive income (loss) 911 620
Comprehensive income $ 5,917 $ 14,664