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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Statement of Comprehensive Income [Abstract]        
Net income $ 12,137 $ 12,335 $ 23,318 $ 22,730
Other comprehensive income (loss), net of tax:        
Net change in unrealized gain (loss) on investment securities 5,866 (11,370) 17,719 (4,461)
Minimum pension liability adjustment 249 256 499 516
Total other comprehensive income (loss), net of tax 6,115 (11,114) 18,218 (3,945)
Comprehensive income $ 18,252 $ 1,221 $ 41,536 $ 18,785