Basic and Diluted Earnings Per Share (EPS) Data Numerator and Denominator Calculation (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	287	984	426	812
Net Income (Loss) Attributable to Parent	$ 5,349	$ 2,814	$ 14,124	$ 15,490
Weighted Average Number of Shares Issued, Basic	19,541	19,170	19,342	19,133
Weighted Average Number of Shares Outstanding, Diluted	429	168	408	205
Weighted Average Number of Shares Outstanding, Diluted	19,970	19,338	19,750	19,338
Earnings Per Share, Basic	$ 0.27	$ 0.15	$ 0.73	$ 0.81
Earnings Per Share, Diluted	$ 0.27	$ 0.15	$ 0.72	$ 0.80