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Consolidated Statements of Comprehensive Income (Parenthetical) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Consolidated Statements of Comprehensive Income [Abstract]
Change in fair value of interest rate swap agreement designated as a cash flow hedge, tax	$ 73	$ 78	$ 39	$ 42
Unrealized gains arising during the period, net of tax	(7)		(7)	(32)
Reclassification adjustment for losses included in net income, tax				(139)
Unrealized gains arising during the period, tax	(2,455)	(3,881)	(1,809)	(4,556)
Reclassification adjustment for gains included in net income on other-than-temporarily impaired securities available for sale, tax	$ 256		$ 454	$ 26

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Tax effect of the income statement impact of the reclassification adjustment for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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