Property, Equipment and Capitalized Software - Schedule (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Property, Equipment and Capitalized Software
Property, equipment and capitalized software, gross	$ 573,318	$ 437,040
Less: Accumulated depreciation and amortization	(457,229)	(323,718)
Total property, equipment and capitalized software, net	116,089	113,322
Capitalized software costs
Property, Equipment and Capitalized Software
Property, equipment and capitalized software, gross	143,748	108,220
Leasehold improvements
Property, Equipment and Capitalized Software
Property, equipment and capitalized software, gross	71,981	67,995
Furniture and equipment
Property, Equipment and Capitalized Software
Property, equipment and capitalized software, gross	$ 357,589	$ 260,825

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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.14)
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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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization

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