CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement of Comprehensive Income [Abstract]
Net Income		$ 13,204	$ 12,217	$ 27,477	$ 25,037
Net change in unrealized gains (losses) on available-for-sale securities:
Net change in unrealized gains (losses) on available-for-sale securities, net of tax of ($2,975), $847, ($5,960) and $3,971, respectively		10,860	(3,058)	21,759	(14,460)
Net reclassification adjustment for net gains included in net income, net of tax of $6, $7, $6 and $7, respectively(1)	[1]	(21)	(24)	(21)	(24)
Other Comprehensive Income (Loss), Securities, Available-for-sale, Adjustment, after Tax		10,839	(3,082)	21,738	(14,484)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax [Abstract]
Net change in unrealized losses on cash flow hedging derivatives, net of tax of $330, ($123), $583 and ($430), respectively		(1,203)	414	(2,128)	1,570
Net reclassification adjustment for effective portion of cash flow hedges, net of tax of ($44), ($44), ($69) and ($105), respectively(2)	[2]	157	159	251	382
Net change in unrealized losses on cash flow hedging derivatives, net of tax		(1,046)	573	(1,877)	1,952
Reclassification of amortization of net unrecognized actuarial loss and prior service cost, net of tax of ($13), ($32), ($26) and ($63), respectively(3)	[3]	48	116	96	232
Other comprehensive income (loss)		9,841	(2,393)	19,957	(12,300)
Comprehensive Income		$ 23,045	$ 9,824	$ 47,434	$ 12,737

[1] (1)Reclassified into the consolidated statements of income within net gain on sale of securities.

[2] (2)Reclassified into the consolidated statements of income within interest and fees on loans, interest on borrowings and subordinated debentures.

[3] (3)Reclassified into the consolidated statements of income within salaries and employee benefits and other expenses.