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Condensed Consolidated Statements of Comprehensive Income - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Statement of Comprehensive Income [Abstract]                
Net income $ 11,366 $ 8,336 $ 5,650 $ 8,234 $ 4,859 $ 7,365 $ 19,702 $ 12,224
Other comprehensive (loss) income, net of tax:                
Unrealized (losses) gains on available for sale securities arising during the period (2,754)       381   (2,745) 321
Change in minimum pension liability 111       5   222 10
Other comprehensive (loss) income (2,643)       386   (2,523) 331
Comprehensive income $ 8,723       $ 5,245   $ 17,179 $ 12,555