CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013		Jun. 30, 2012
Statement of Other Comprehensive Income [Abstract]
Net income	$ 8,983	$ 8,713	$ 16,404		$ 17,151
Securities available for sale:
Changes in fair value in securities available for sale	(3,821)	(601)	(4,874)		(458)
Net losses (gains) on securities reclassified into earnings	0	(192)	393	[1]	(138)	[1]
Net change in fair value of securities available for sale	(3,821)	(793)	(4,481)		(596)
Reclassification adjustment for other-than-temporary impairment losses transferred into earnings	0	0	1,384	[2]	80	[2]
Cash flow hedges:
Change in fair value of cash flow hedges	34	(128)	32		(204)
Net cash flow hedge losses reclassified into earnings	118	112	240	[3]	223	[3]
Net change in fair value of cash flow hedges	152	(16)	272		19
Defined benefit plan obligation adjustment	292	171	629	[4]	356	[4]
Total other comprehensive (loss) income, net of tax	(3,377)	(638)	(2,196)		(141)
Total comprehensive income	$ 5,606	$ 8,075	$ 14,208		$ 17,010

[1] Reported as total other-than-temporary impairment losses on securities in the Consolidated Income Statement.

[2] Reported as the portion of loss recognized in other comprehensive income in the Consolidated Income Statement.

[3] Included in interest expense on junior subordinated debentures in the Consolidated Income Statement.

[4] Included in salaries and employee benefits expense in the Consolidated Income Statement. See Note 12 and the Annual Report on Form 10‑K for fiscal year 2012 for additional information.