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Stockholders' Equity - Narrative (Details) $ in Thousands			12 Months Ended
	Oct. 02, 2019 USD ($) shares	Apr. 03, 2017 USD ($) shares	Dec. 31, 2019 USD ($) vote shares	Dec. 31, 2018 USD ($) shares	Dec. 31, 2017 USD ($)	Nov. 02, 2018 shares
Accumulated Other Comprehensive Income (Loss) [Line Items]
Share consideration given for acquisitions | $			$ 16,195	$ 0	$ 17,601
Common Stock
Accumulated Other Comprehensive Income (Loss) [Line Items]
Common stock, votes entitled per share | vote			1
Stock Repurchase Program, Number of Shares Authorized to be Repurchased						2,000,000
Stock repurchased			250,000	467,000
Plateau
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued in acquisition of business (in shares)	1,245,000
Share consideration given for acquisitions | $	$ 16,195
Tealstone
Accumulated Other Comprehensive Income (Loss) [Line Items]
Shares issued in acquisition of business (in shares)		1,882,000
Share consideration given for acquisitions | $		$ 17,061

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Number of shares of equity interests issued or issuable to acquire entity.

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