CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) (Parenthetical) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net change in unrealized losses on available-for-sale securities, net of tax of ($2,985) and $3,124, respectively	$ (2,985)	$ 3,124
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI for Sale of Securities, Tax	0	0
Net change in unrealized gains (losses) on cash flow hedging derivatives, tax effect	253	(355)
Net reclassification adjustment for effective portion of cash flow hedges included in interest expense, tax effect	(25)	(13)
Reclassification of amortization of net unrecognized actuarial loss and prior service cost, net of tax of ($13) and ($31), respectively(2)	$ (13)	$ (31)