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Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Consolidated Statements Of Comprehensive Income
Net income	$ 13,642	$ 9,982	$ 60,259
Unrealized gains on securities available for sale:
Unrealized holding gains arising during the period, pretax	1,492	672	1,455
Tax expense	(583)	(261)	(567)
Reclassification to realized (gains) losses	(74)	(26)	104
Tax expense (benefit)	29	10	(41)
Postretirement Plans:
Net gain (loss) arising during period	(7,798)	(2,307)	3,623
Tax (expense) benefit	3,080	911	(1,397)
Amortization of unrecognized net actuarial loss	393	531	869
Tax expense	(155)	(210)	(339)
Amortization of prior service cost and transition obligation	32	35	36
Tax expense	(13)	(13)	(14)
Other comprehensive income	(3,597)	(658)	3,729
Comprehensive income	$ 10,045	$ 9,324	$ 63,988

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