Property and Depreciation Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	1 Months Ended	12 Months Ended
	Jan. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jan. 30, 2016
Property, Plant and Equipment [Line Items]
Depreciation		$ 38,588	$ 35,040	$ 32,917
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Disposal Group, Including Discontinued Operation, Property, Plant and Equipment, Noncurrent		58	7,669
Disposal Group, Including Discontinued Operation, Consideration		7,669	740
Gain on sale of assets held for sale		$ 4,691	85
Building
Property, Plant and Equipment [Line Items]
Estimated useful asset life		42 years
Furniture, Fixtures & Equipment and Software | Minimum
Property, Plant and Equipment [Line Items]
Estimated useful asset life		3 years
Furniture, Fixtures & Equipment and Software | Maximum
Property, Plant and Equipment [Line Items]
Estimated useful asset life		14 years
Software and Software Development Costs
Property, Plant and Equipment [Line Items]
Property plant and equipment additions		$ 4,559	3,501
Assets Held under Capital Leases
Property, Plant and Equipment [Line Items]
Property plant and equipment additions		7,354	10,430
Capitalized Interest Costs
Property, Plant and Equipment [Line Items]
Interest costs capitalized		$ 225	$ 102	$ 182
Subsequent Event [Member] | Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Gain on sale of assets held for sale	$ 1,627
Disposal Group, Including Discontinued Operation, Assets					$ 58