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v3.19.1

Summary of Significant Accounting Policies - Activity (Details) - USD ($) $ in Thousands | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2019 | Jan. 01, 2019 | Dec. 31, 2018
Accounting Policies [Abstract] |  |  |
Finance Lease, Right-of-Use Asset | $ 39,759 | $ 18,948 | $ 18,900
Operating Lease, Right-of-Use Asset | 343,221 | 387,970 |
Leases, Right-of-Use Asset |  | 406,900 |
Finance Lease, Liability, Current | 5,238 | 728 |
Operating Lease, Liability, Current | 45,357 | 48,104 |
Finance Lease, Liability, Noncurrent | 36,764 | 19,829 |
Operating Lease, Liability, Noncurrent | 308,159 | 350,818 |
Finance Lease, Right-of-Use Asset, New Leases |  | 0 |
Operating Lease, Right-of-Use Asset, New Leases |  | 0 |
Finance Lease, Liability, Current, New Leases |  | 0 |
Operating Lease, Liability, Current, New Leases |  | 21 |
Finance Lease, Liability, Noncurrent, New Leases |  | 0 |
Operating Lease, Liability, Noncurrent, New Leases |  | 0 |
Finance Lease, Right-of-Use Asset, Modifications |  | 21,520 |
Operating Lease, Right-of-Use Asset, Modifications |  | (33,697) |
Finance Lease, Liability, Current, Modifications |  | 4,510 |
Operating Lease, Liability, Current, Modifications |  | (1,473) |
Finance Lease, Liability, Noncurrent, Modifications |  | 16,935 |
Operating Lease, Liability, Noncurrent, Modifications |  | $ (32,262) |
Finance Lease, Right-of-Use Asset, Amortization | (709) |  |
Operating Lease, Right-of-Use Asset, Amortization | (11,052) |  |
Finance Lease, Liability, Current, Amortization | 0 |  |
Operating Lease, Liability, Current, Amortization | (1,295) |  |
Finance Lease, Liability, Noncurrent, Amortization | 0 |  |
Operating Lease, Liability, Noncurrent, Amortization | $ (10,397) |  |

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