Property and Depreciation Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation	$ 39,332	$ 38,588	$ 35,040
Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations [Member]
Property, Plant and Equipment [Line Items]
Net book value of assets held for sale	464	58
Net book value of sold assets held for sale	148	7,669
Gain on sale of assets held for sale	$ 2,004	4,691
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	$ 3,542	4,559
Assets Held under Capital Leases
Property, Plant and Equipment [Line Items]
Property plant and equipment additions	427	7,354
Capitalized Interest Costs
Property, Plant and Equipment [Line Items]
Interest costs capitalized	$ 0	$ 225	$ 102