Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net income	$ 38,043	$ 41,027	$ 37,187
Other comprehensive income (loss), net of tax:
Unrealized (losses) gains arising during the period (net of tax of ($531), ($1,171), and ($839), respectively)	(721)	(2,176)	(1,558)
Unrealized (losses) gains arising during the period (net of tax of $112, $24, and ($41), respectively)	209	44	(76)
Minimum pension liability adjustment (net of tax of ($9), $1, and $69, respectively)	(70)	1	114
Reclassification adjustment for impairment of equity security realized in income (net of tax of $0, $0, and $36, respectively)			67
Reclassification adjustment for securities losses reclassified out of other comprehensive income into loss on sale of securities available-for-sale (net of tax of $81, $0, and $0, respectively)	151
Other comprehensive (loss) income	(431)	(2,131)	(1,453)
Comprehensive income	$ 37,612	$ 38,896	$ 35,734