Summary of Significant Accounting Policies - Reconciliation of Cash and Restricted Cash (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents Items [Line Items]
Cash and cash equivalents	$ 97,825	$ 39,293
Restricted cash	9,492	12,772
Total cash, cash equivalents and restricted cash shown in the consolidated statements of cash flows	107,317	52,065	$ 122,255	$ 117,066
Captive Insurance Subsidiary
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	0	5,144
Letter of Credit
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	9,492	$ 7,628
Initial Capitalization
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 1,500