Accrued Liabilities (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accrued Liabilities, Current [Abstract]
Accrued salaries, wages and benefits	$ 3,604	$ 3,552
Accrual for self-insurance liabilities	5,787	3,806
Property taxes	584	2,458
Notes Payable, Current	481
Notes Payable		0
Other accrued expenses	959	2,640
Total accrued liabilities	$ 11,415	$ 12,456