CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Statement of Comprehensive Income [Abstract]
Net income		$ 10,935	$ 11,010
Other comprehensive income, net of tax:
Net change in fair value of securities available for sale		364	664
Cash flow hedges:
Change in fair value of cash flow hedges		(66)	(8)
Net cash flow hedge losses reclassified into earnings	[1]	0	93
Net change in fair value of cash flow hedges		(66)	85
Defined benefit plan obligation adjustment	[2]	166	235
Total other comprehensive income (loss), net of tax		464	984
Total comprehensive income		$ 11,399	$ 11,994

[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.