Discontinued Operation and Disposition (Details) - USD ($) $ in Thousands		12 Months Ended
	Jan. 12, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Discontinued Operation and Disposition
Proceeds from sale of asset		$ 5,000
Gain on sale of a discontinued operation		208
Loss from a discontinued operation, net of taxes		606	$ 2,670	$ 2,612
Nevada | Sold
Discontinued Operation and Disposition
Proceeds from sale of asset	$ 5,000
Gain on sale of a discontinued operation		208
Income tax benefit from gain on discontinued operation		1,247
Loss from a discontinued operation, net of taxes		606
Income tax benefit from discontinued operations		404
Term of transition service agreement	180 days
Tax deductible goodwill and intangible assets		32,128
Tax deductible goodwill resulting in income tax benefit during the period		4,190
Income tax benefit recognized on tax deductible goodwill		$ 1,510
Nevada | Held-for-sale
Discontinued Operation and Disposition
Carrying value of inventory			3,129
Carrying value of plant, equipment and leasehold improvements			2,910
Loss from a discontinued operation, net of taxes			2,670	2,612
Income tax benefit from discontinued operations			$ 1,421	$ 1,398