Shareholders' Equity (Details) (USD $)	0 Months Ended			9 Months Ended
	Jul. 18, 2013	May 25, 2011	Feb. 22, 2011	Sep. 30, 2012
Stock Repurchase Plan and Tender Offer
Repurchase of common stock, authorized		$ 20,000,000	$ 15,000,000
Repurchase of common stock, net	2,200,000			213,000
Repurchase of common stock, shares	929,051			104,000
Price per share (in dollars per share)	$ 2.35
Minimum
Stock Repurchase Plan and Tender Offer
Offered price per share under tender offer (in dollars per share)	$ 2.15
Maximum
Stock Repurchase Plan and Tender Offer
Repurchase of common stock, authorized	$ 12,000,000
Offered price per share under tender offer (in dollars per share)	$ 2.35