Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2017
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning balance	$ 1,843
Current period provision	2,130	$ 1,209	$ 1,820
Write-offs charged against the allowance, net of recoveries of amounts previously written off	(1,216)
Allowance for credit losses, ending balance	2,757	1,843
Adjustment for adoption of credit losses accounting standard	179,935	167,263	168,331	$ 134,277
Retained Earnings
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Adjustment for adoption of credit losses accounting standard	$ 388,645	350,545	237,308	195,143
Cumulative Effect, Period of Adoption, Adjustment
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Adjustment for adoption of credit losses accounting standard		(214)	0	(179)
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Adjustment for adoption of credit losses accounting standard		$ (214)	$ (168)	$ (179)	$ 300