Consolidated Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Total
Beginning balance at Dec. 31, 2011	$ 3,757	$ 122,487	$ 94,440	$ 6,446	$ 11,558	$ 215,572
Beginning balance (in shares) at Dec. 31, 2011	20,873,000				1,609,000
Equity incentive plan activity		380				380
Accretion of redeemable non-controlling interest		(392)				(392)
Net income (loss)			3,524			3,524
Other comprehensive income, net of tax				1,453		1,453
Ending balance at Dec. 31, 2012	3,757	122,475	97,964	7,899	(11,558)	220,537
Ending balance (in shares) at Dec. 31, 2012	20,873,000				1,609,000
Equity incentive plan activity		352				352
Net income (loss)			8,245			8,245
Other comprehensive income, net of tax				8,984		8,984
Ending balance at Dec. 31, 2013	3,757	122,827	106,209	16,883	(11,558)	238,118
Ending balance (in shares) at Dec. 31, 2013	20,873,000				1,609,000
Acquisition of treasury shares					(1,805)	(1,805)
Acquisition of treasury shares (in shares)					181,000
Equity incentive plan activity		222				222
Stock options exercised		145			1,010	1,155
Stock options, exercised (in shares)					(135,000)	(135,359)
Net income (loss)			13,429			13,429
Other comprehensive income, net of tax				918		918
Ending balance at Dec. 31, 2014	$ 3,757	$ 123,194	$ 119,638	$ 17,801	$ (12,353)	$ 252,037
Ending balance (in shares) at Dec. 31, 2014	20,873,000				1,655,000