Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property and Equipment
Property and equipment	$ 216,767	$ 200,728
Less accumulated depreciation and amortization	(97,033)	(89,689)
Property and equipment, net	119,734	111,039
Depreciation and amortization expense	18,393	35,525	$ 53,607
Land [Member]
Property and Equipment
Property and equipment	5,579	5,579
Land Improvements [Member]
Property and Equipment
Property and equipment	2,242	2,242
Buildings [Member]
Property and Equipment
Property and equipment	51,399	51,409
Buildings and Leasehold Improvements [Member]
Property and Equipment
Property and equipment	11,691	9,581
Computer Equipment
Property and Equipment
Property and equipment	95,020	85,316
Furniture, Fixtures and Equipment
Property and Equipment
Property and equipment	10,423	4,955
Internally Developed Software [Member]
Property and Equipment
Property and equipment	37,175	39,270
Construction in Progress [Member]
Property and Equipment
Property and equipment	$ 3,238	$ 2,376