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Significant Accounting and Reporting Policies - Property and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Property Plant And Equipment [Line Items] |  |
Property and equipment, gross | $ 125,784 | $ 116,879
Less accumulated depreciation | (89,382) | (85,454)
Net property and equipment | 36,402 | 31,425
Furniture and Fixtures |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, gross | $ 28,264 | 29,898
Furniture and Fixtures | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 3 years |
Furniture and Fixtures | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 10 years |
Computer Equipment |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, gross | $ 64,781 | 57,574
Computer Equipment | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 3 years |
Computer Equipment | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 5 years |
Automobiles |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, gross | $ 314 | 236
Automobiles | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 3 years |
Automobiles | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 4 years |
Building and Building Improvements |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, gross | $ 32,087 | 28,840
Building and Building Improvements | Minimum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 7 years |
Building and Building Improvements | Maximum |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, useful life | 40 years |
Land |  |
Property Plant And Equipment [Line Items] |  |
Property and equipment, gross | $ 338 | $ 331

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- Definition Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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