Summary of Significant Accounting Policies - Assets Held For Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets
Total current assets	$ 41,636	$ 0
Disposal Group | ES
Assets
Accounts receivable (less allowance for doubtful accounts of $24)	9,395
Allowance for doubtful accounts	24
Inventory	6,453
Deferred income taxes	1,246
Other current assets	3,315
Total current assets	20,409
Property and equipment, net of accumulated depreciation of $8,509	1,941
Accumulated depreciation	8,509
Goodwill	17,772
Other Intangible Assets	1,514
Preliminary total assets to be sold	41,636
Liabilities
Accounts payable	4,836
Accrued liabilities	1,944
Preliminary total liabilities to be sold	$ 6,780