Other Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Other Accrued Liabilities [Abstract]
Accrued expenses	$ 3,060	$ 2,421
Customer deposits	1,748	997
Other accrued liabilities	615	551
Total other accrued liabilities	$ 5,423	$ 3,969