Income Taxes (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Amounts of tax benefits that would affect effective tax rate if recognized	$ 1,521	$ 1,357
Income tax accrued interest	122	89
Statute of limitations amount	538
Unrecognized tax benefits	$ 2,095	$ 1,885