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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

X

- Definition

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, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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