Treasury Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Equity [Abstract]
Shares repurchased	140,759	37,267
Cost of shares repurchased	$ 3,153	$ 619
Treasury stock reissued (shares)	22,500	30,000
Shares available for repurchase	945,812