Subsequent Event (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Feb. 12, 2021 |
Dec. 31, 2020 |
Sep. 30, 2020 |
Jun. 30, 2020 |
Mar. 31, 2020 |
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2020 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Feb. 05, 2021 |
Jan. 12, 2020 |
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| Subsequent Event [Line Items] | ||||||||||||||
| Operating revenue | $ 350,341 | $ 331,997 | $ 281,678 | $ 305,557 | $ 319,656 | $ 313,683 | $ 302,887 | $ 278,961 | $ 1,269,573 | $ 1,215,187 | $ 1,137,613 | |||
| Operating Income (Loss) | $ 73,924 | $ 112,416 | $ 117,216 | |||||||||||
| Assets acquired and liabilities assumed, net of cash | $ 15,000 | |||||||||||||
| Earn-out acquired, maximum | $ 2,000 | |||||||||||||
| Cash from sale of Pool | $ 8,000 | |||||||||||||
| Earn-out from sale of Pool | 12,000 | |||||||||||||
| Total consideration received for sell of Pool business | $ 20,000 | |||||||||||||
| Linn Star [Member] | ||||||||||||||
| Subsequent Event [Line Items] | ||||||||||||||
| Assets acquired and liabilities assumed, net of cash | $ 55,931 | |||||||||||||
| X | ||||||||||
- Definition Total consideration received for sell of Pool business No definition available.
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| X | ||||||||||
- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount recognized as of the acquisition date for the identifiable assets acquired in excess of (less than) the aggregate liabilities assumed. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Carrying amounts due as of the balance sheet date of the sum of amounts receivable other than from customers. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The net result for the period of deducting operating expenses from operating revenues. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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| X | ||||||||||
- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. No definition available.
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| X | ||||||||||
- Details
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