CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Net Income		$ 9,616	$ 7,193	$ 18,262	$ 12,804
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 ($1,821), $2,138, ($6,004) and ($74), respectively		3,382	(3,970)	11,151	138
Net reclassification adjustment for gains included in net income, net of tax of $1, $0, $1 and $0, respectively	[1]	(3)	0	(3)	0
Net change in unrealized gains (losses) on available-for-sale securities, net of tax		3,379	(3,970)	11,148	138
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax [Abstract]
Net change in unrealized gains (losses) on cash flow hedging derivatives, net of tax of $705, ($857), $1,966, and ($106), respectively		(1,309)	1,591	(3,652)	196
Net reclassification adjustment for effective portion of cash flow hedges included in interest expense, net of tax of ($218), ($55), ($345) and ($175), respectively	[2]	404	103	642	326
Net change in unrealized gains (losses) on cash flow hedging derivatives, net of tax		(905)	1,694	(3,010)	522
Reclassification of amortization of net unrecognized actuarial loss and prior service cost, net of tax of ($21), ($20), ($42) and ($41), respectively	[3]	38	39	76	77
Other comprehensive income (loss)		2,512	(2,237)	8,214	737
Comprehensive Income		$ 12,128	$ 4,956	$ 26,476	$ 13,541

[1] (2) Reclassified into the consolidated statements of income in interest on subordinated debentures.

[2] Reclassified into the consolidated statements of income in interest on subordinated debentures.

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