Consolidated Statements of Comprehensive Income (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income	$ 7,092	$ 7,443
Other comprehensive income (loss):
Net unrealized gain (loss) on cashflow hedge	(9)	715
Net unrealized gain (loss) on available for sale debt securities	2,467	(3,335)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax	(328)	0
Other Comprehensive Income (Loss), Net of Tax	2,130	(2,620)
Total comprehensive income	$ 9,222	$ 4,823