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Leases (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018
Leases [Abstract] |  |
Weighted average remaining lease term for operating leases | 4 years 1 month 6 days |
Weighted average discount rate for operating leases | 4.80% |
Components of Lease Expense [Abstract] |  |
Operating lease cost | $ 12,861 |
Short-term lease cost | 52 |
Variable lease cost | 1,052 |
Total lease expense | 13,965 |
Operating right-of-use assets | 117,329 | $ 0
Current operating lease liabilities | 38,900 |
Long-term operating lease liabilities | 81,075 | 0
Supplemental Cash Flow Information Related to Leases [Abstract] |  |
Operating cash outflow from operating leases | 14,377 |
ROU assets obtained in exchange for lease obligations | 128,704 |
Maturities of Operating Lease Liabilities [Abstract] |  |
2019 | 43,686 |
2020 | 33,522 |
2021 | 23,544 |
2022 | 13,187 |
2023 | 8,542 |
Thereafter | 10,398 |
Total | 132,879 |
Less: Finance charges | 12,899 |
Total principal liability | 119,980 |
Additional lease liabilities not yet commenced | $ 2,600 |
Operating Leases, Minimum Future Obligations [Abstract] |  |
2019 |  | 39,358
2020 |  | 27,553
2021 |  | 20,266
2022 |  | 11,723
2023 |  | 9,950
Thereafter |  | 7,628
Total minimum lease payments |  | 116,478
Financing Obligations, Minimum Future Obligations [Abstract] |  |
2019 |  | 726
2020 |  | 748
2021 |  | 757
2022 |  | 770
2023 |  | 794
Thereafter |  | 1,148
Total minimum lease payments |  | $ 4,943
Minimum [Member] |  |
Leases [Abstract] |  |
Remaining lease terms | 1 year |
Maximum [Member] |  |
Leases [Abstract] |  |
Remaining lease terms | 15 years |
Extension period for leases | 10 years |
Termination period for leases | 1 year |

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- Definition Amount of variable lease cost, excluded from lease liability, recognized when obligation for payment is incurred for finance and operating leases. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=77888399&loc=SL77918982-209971 + Details
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