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16. Leases (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Lessee, Lease, Description [Line Items] |  |  |
Unrecorded Unconditional Purchase Obligation | $ 1,600 |  |
Lessee, Operating Lease, Lease Not yet Commenced, Term of Contract | 4 years |  |
Deferred Tax Assets, Other | $ 26,000 | $ 27,100 |
U.S. | 1,034,000 | 363,400 | $ 72,800
Operating Leases, Rent Expense, Net |  | 47,400 | $ 43,600
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year | 41,000 |  |
Finance Lease, Liability, Payments, Remainder of Fiscal Year | $ 1,100 |  |
Operating Lease, Weighted Average Remaining Lease Term | 9 years |  |
Property, Plant and Equipment, Gross | $ 1,382,172 | 1,326,829 |
Operating lease right-of-use asset | 201,868 | 0 |
Operating Lease, Payments | 47,200 |  |
Capital Leases, Future Minimum Payments Due in Three Years |  | 500 |
Operating Leases, Future Minimum Payments Due, Next Twelve Months |  | 44,400 |
Operating Leases, Future Minimum Payments, Due in Two Years |  | 37,800 |
Operating leases, due in three years |  | 27,400 |
Operating Lease, Cost | 51,400 |  |
Finance Lease, Right-of-Use Asset, Amortization | 600 |  |
Finance Lease, Interest Expense | 900 |  |
Finance Lease Cost | 1,500 |  |
Sublease Income | 3,000 |  |
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals |  | 17,800 |
Operating Leases, Future Minimum Payments, Due in Four Years |  | 19,700 |
Operating Leases, Future Minimum Payments, Due in Five Years |  | 13,900 |
Operating Leases, Future Minimum Payments, Due Thereafter |  | 25,600 |
Capital Leases, Future Minimum Payments Due, Next Twelve Months |  | 500 |
Capital Leases, Future Minimum Payments Due in Two Years |  | 200 |
Capital Leases, Future Minimum Payments Due in Four Years |  | 400 |
Capital Leases, Future Minimum Payments Due in Five Years |  | 400 |
Capital Leases, Future Minimum Payments Due Thereafter |  | 9,900 |
Finance Lease, Interest Payment on Liability | 900 |  |
Finance Lease, Principal Payments | 600 |  |
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability | 28,700 |  |
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability | 200 |  |
Current operating lease liabilities | 35,365 | 0 |
Operating lease liabilities | 176,018 | 0 |
Less: accumulated depreciation and amortization | (882,833) | (818,139) |
Current maturities of long-term debt and notes payable | 500 |  |
Finance Lease, Liability, Noncurrent | 11,200 |  |
Property, plant and equipment, net | 499,339 | 508,690 |
Operating Lease, Liability | $ 211,400 |  |
Finance Lease, Weighted Average Remaining Lease Term | 18 years |  |
Operating Lease, Weighted Average Discount Rate, Percent | 4.20% |  |
Finance Lease, Weighted Average Discount Rate, Percent | 6.50% |  |
Lessee, Operating Lease, Liability, Payments, Due Year Two | $ 35,800 |  |
Finance Lease, Liability, Payments, Due Year Two | 1,300 |  |
Lessee, Operating Lease, Liability, Payments, Due Year Three | 28,600 |  |
Finance Lease, Liability, Payments, Due Year Three | 1,200 |  |
Lessee, Operating Lease, Liability, Payments, Due Year Four | 24,500 |  |
Finance Lease, Liability, Payments, Due Year Four | 1,100 |  |
Lessee, Operating Lease, Liability, Payments, Due Year Five | 21,800 |  |
Finance Lease, Liability, Payments, Due Year Five | 1,100 |  |
Lessee, Operating Lease, Liability, Payments, Due after Year Five | 103,700 |  |
Finance Lease, Liability, Payments, Due after Year Five | 15,200 |  |
Lessee, Operating Lease, Liability, Payments, Due | 255,400 |  |
Finance Lease, Liability, Payment, Due | 21,000 |  |
Lessee, Operating Lease, Liability, Undiscounted Excess Amount | (44,000) |  |
Finance Lease, Liability, Undiscounted Excess Amount | (9,300) |  |
Finance Lease, Liability | $ 11,700 |  |
Maximum [Member] |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Lessee Operating And Finance Leases Remaining Lease Term | 19 years |  |
Minimum [Member] |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Lessee Operating And Finance Leases Remaining Lease Term | 1 year |  |
Finance Lease [Member] |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Property, Plant and Equipment, Gross | $ 11,400 |  |
Less: accumulated depreciation and amortization | (4,200) |  |
Property, plant and equipment, net | 7,200 |  |
Operating lease obligations [Member] |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Deferred Tax Assets, Other | $ 48,600 | $ 0 |

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