CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (UNAUDITED) (USD $) In Thousands	Common stock [Member]	Surplus [Member]	Retained earnings [Member]	Treasury stock [Member]	Accumulated other comprehensive income (loss), net of tax [Member]	Total
Balance at Dec. 31, 2011	$ 34,330	$ 24,010	$ 91,303	$ (10,013)	$ (3,070)
Stock options exercised	0	0
Private equity offering, net of $2,239 of stock issuance costs		18,162
Reissuance of 1,839,533 common shares from treasury in connection with private equity offering				4,599
Net (loss) income			(3,793)			(3,793)
Stock-based compensation		304				304
Other comprehensive loss					(552)	(4,345)
Balance at Sep. 30, 2012	34,330	42,476	87,510	(5,414)	(3,622)	155,280
Balance at Dec. 31, 2012	34,330	42,628	89,555	(5,414)	2,886	163,985
Stock options exercised	18	74
Private equity offering, net of $2,239 of stock issuance costs		0
Reissuance of 1,839,533 common shares from treasury in connection with private equity offering				0
Net (loss) income			9,390			9,390
Stock-based compensation		367				367
Other comprehensive loss					(12,164)	(2,774)
Balance at Sep. 30, 2013	$ 34,348	$ 43,069	$ 98,945	$ (5,414)	$ (9,278)	$ 161,670