Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Other comprehensive income, before tax:
Change in pension liabilities	$ 174	$ 289	$ 349	$ 596
Change in unrealized loss on derivative instruments used in cash flow hedges	804	539	1,592	645
Unrealized gains on securities:
Unrealized holding gains arising during period	19,425	16,689	28,402	21,052
Reclassification adjustment for gains included in net income	(106)	0	(106)	0
Other comprehensive income, before tax:	20,297	17,517	30,237	22,293
Income tax expense related to other comprehensive income	(7,620)	(6,409)	(11,441)	(8,173)
Other comprehensive income, net of tax:	12,677	11,108	18,796	14,120
Net income	17,986	16,162	34,146	30,164
Comprehensive income	$ 30,663	$ 27,270	$ 52,942	$ 44,284