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Supplemental Cash Flow Information - Reconciliation of Cash, Cash Equivalents, and Restricted Cash (Details) - USD ($) $ in Thousands | Jun. 30, 2022 | Mar. 31, 2022 | Dec. 31, 2021 | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020
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Cash, Cash Equivalents and Restricted Cash [Line Items] |  |  |  |  |  |
Cash and cash equivalents | $ 150,653 | $ 238,258 | $ 229,097 | $ 212,473 | $ 200,218 | $ 184,620
Total cash, cash equivalents, and restricted cash reported in the statements of cash flows | 153,366 | 240,836 | 231,887 | 214,715 | 202,615 | 186,808
Captive Insurance Company |  |  |  |  |  |
Cash, Cash Equivalents and Restricted Cash [Line Items] |  |  |  |  |  |
Cash and cash equivalents | 47,896 | 134,800 | 133,302 | 132,000 | 131,800 | 85,000
Prepaid Expenses and Other Current Assets |  |  |  |  |  |
Cash, Cash Equivalents and Restricted Cash [Line Items] |  |  |  |  |  |
Restricted cash and cash equivalents | 1,763 | 1,628 | 1,836 | 1,460 | 1,518 | 1,275
Other Assets |  |  |  |  |  |
Cash, Cash Equivalents and Restricted Cash [Line Items] |  |  |  |  |  |
Restricted cash and cash equivalents | $ 950 | $ 950 | $ 954 | $ 782 | $ 879 | $ 913

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3044-108585 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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