Consolidated Statements of Changes in Stockholders Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at December 31, 2008 at Dec. 31, 2008	$ 214	$ 200,893	$ (4,009)	$ 127,715	$ 324,813
Balance at December 31, 2008 (in Shares) at Dec. 31, 2008	21,393,000
Net income (loss)				13,535	13,535
Other comprehensive income (loss)			16,936		16,936
Stock based compensation		4,611			4,611
Restricted stock grants	4				4
Restricted stock grants (in Shares)	320,000
Exercise of stock options		47			47
Exercise of stock options (in Shares)	7,000
Minimum tax withholdings on restricted stock vestings	(1)	(472)			(473)
Minimum tax withholdings on restricted stock vestings (in Shares)	(44,000)
Balance at Dec. 31, 2009	217	205,079	12,927	141,250	359,473
Balance (in Shares) at Dec. 31, 2009	21,676,000
Net income (loss)				(1,583)	(1,583)
Other comprehensive income (loss)			(7,336)		(7,336)
Dividends declared ($0.20 per share)				(4,402)	(4,402)
Stock based compensation		5,424			5,424
Restricted stock grants	3				3
Restricted stock grants (in Shares)	400,000
Exercise of stock options		26			26
Exercise of stock options (in Shares)	4,000
Minimum tax withholdings on restricted stock vestings		(588)			(588)
Minimum tax withholdings on restricted stock vestings (in Shares)	(55,000)
Balance at Dec. 31, 2010	220	209,941	5,591	135,265	351,017
Balance (in Shares) at Dec. 31, 2010	22,025,000				22,025,450
Net income (loss)				(14,526)	(14,526)
Other comprehensive income (loss)			17,678		17,678
Dividends declared ($0.20 per share)				(4,466)	(4,466)
Stock based compensation		4,701			4,701
Restricted stock grants	4	1			5
Restricted stock grants (in Shares)	438,000
Minimum tax withholdings on restricted stock vestings	(1)	(897)			(898)
Minimum tax withholdings on restricted stock vestings (in Shares)	(135,000)
Balance at Dec. 31, 2011	$ 223	$ 213,746	$ 23,269	$ 116,273	$ 353,511
Balance (in Shares) at Dec. 31, 2011	22,328,000				22,327,749