Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 5,930	$ 4,281	$ 9,592	$ 12,586
Other comprehensive income (loss):
Net unrealized gain (loss) on cashflow hedge	313	608	980	(1,332)
Net unrealized gain (loss) on available for sale debt securities	383	(905)	2,452	1,370
Net unrealized gain (loss) on other post-retirement benefits			219	0
Other Comprehensive Income (Loss), Net of Tax	696	(297)	3,651	38
Total comprehensive income	$ 6,626	$ 3,984	$ 13,243	$ 12,624