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Summary of Significant Accounting Policies (Property and Equipment) (Details) | 12 Months Ended
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Dec. 31, 2018
Computer hardware [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 3
Furniture and fixtures [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 10
Maximum [Member] | Computer software [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 5
Maximum [Member] | Software licenses [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 5
Maximum [Member] | Internally developed software [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 10
Maximum [Member] | Building and improvements [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 40
Minimum [Member] | Computer software [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 3
Minimum [Member] | Software licenses [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 3
Minimum [Member] | Internally developed software [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 5
Minimum [Member] | Building and improvements [Member] |
Property, Plant and Equipment, Estimated Useful Lives | 5

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- Definition Describes the periods of time over which an entity anticipates to receive utility from its property, plant and equipment (that is, the periods of time over which an entity allocates the initial cost of its property, plant and equipment). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 35 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=68071081&loc=d3e1205-110223 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790 + Details
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- Details
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