CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 12,327	$ 10,208	$ 34,319	$ 32,721
Other comprehensive income (loss), net of tax:
Net change in fair value of securities available for sale		(91)	344	1,651	(693)
Cash flow hedges:
Change in fair value of cash flow hedges		(4)	(1)	(94)	(10)
Net cash flow hedge losses reclassified into earnings	[1]	0	82	0	265
Net change in fair value of cash flow hedges		(4)	81	(94)	255
Defined benefit plan obligation adjustment	[2]	166	233	497	822
Total other comprehensive income (loss), net of tax		71	658	2,054	384
Total comprehensive income		$ 12,398	$ 10,866	$ 36,373	$ 33,105

[1] Included in interest expense on junior subordinated debentures in the Consolidated Statements of Income.

[2] Included in salaries and employee benefits expense in the Consolidated Statements of Income.