Summary of Significant Accounting Policies (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Deferred Revenue Arrangement [Line Items]
Licensing contract term	5 years
Advertising costs	$ 404	$ 346
Minimum
Deferred Revenue Arrangement [Line Items]
Royalty percent earned on licensing agreement	4.00%
Maximum
Deferred Revenue Arrangement [Line Items]
Royalty percent earned on licensing agreement	6.00%
Buildings | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life	10 years
Buildings | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life	33 years
Trucks and automotive equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life	3 years
Trucks and automotive equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life	10 years
Shop machinery and equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life	3 years
Shop machinery and equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life	10 years
Land improvements | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life	10 years
Land improvements | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life	15 years
Office equipment | Minimum
Deferred Revenue Arrangement [Line Items]
Useful life	3 years
Office equipment | Maximum
Deferred Revenue Arrangement [Line Items]
Useful life	10 years