Stock-Based Compensation (Narrative) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Share Based Compensation Arrangment By Share Based Payment Award [Line Items]
Unvested restricted stock awards outstanding (in Shares)	120	137	40	148
Stock options outstanding and exercisable, aggregate instrinsic value	$ 94
Stock options exercisable and outstanding, weighted-average remaining contractual term (in Duration)	1 year 7 months 24 days
Closing price of company's common stock (in Dollars per Share)	$ 7.04
Exercise price range, lower limit (in Dollars per Share)	$ 5.41
Exercise price range, upper limit (in Dollars per Share)	$ 22.60
Stock-based compensation expense, associated with restricted stock	900	400	600
Non-vested restricted stock, unrecognized compensation costs	500
Unrecognized compensation costs, period of recognition (in Duration)	10 months
Aggregate intrinsic value, non-vested restricted stock	$ 800
Maximum [Member]
Share Based Compensation Arrangment By Share Based Payment Award [Line Items]
Restricted stock, vesting period (in Duration)	24 months
Minimum [Member]
Share Based Compensation Arrangment By Share Based Payment Award [Line Items]
Restricted stock, vesting period (in Duration)	12 months