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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2018
Commitment And Contingencies [Line Items] |
Schedule of Warranty Reserves | Warranty reserves consisted of the following (in thousands):
| Year Ended December 31,
| 2018 |  | 2017 |  | 2016
Warranty reserves, beginning of period | $ | 69,373 |  |  | $ | 83,135 |  |  | $ | 45,948 |
Warranty reserves accrued | 25,340 |  |  | 13,336 |  |  | 12,712 |
Adjustments to pre-existing reserves(1) | (4,286 | ) |  | (9,354 | ) |  | 36,826 |
Warranty expenditures | (18,591 | ) |  | (17,744 | ) |  | (12,351 | )
Warranty reserves, end of period | $ | 71,836 |  |  | $ | 69,373 |  |  | $ | 83,135 |
Office Space Buildings And Equipment |
Commitment And Contingencies [Line Items] |
Schedule of Future Minimum Lease Payments under Non-Cancellable Operating Lease Agreements | The future minimum rental payments under operating leases, which primarily consist of office leases having initial or remaining noncancellable lease terms in excess of one year, are as follows (in thousands):
2019 | $ | 7,502 |
2020 | 7,883 |
2021 | 6,776 |
2022 | 5,198 |
2023 | 4,088 |
Thereafter | 8,094 |
| $ | 39,541 |
Ground Leases |
Commitment And Contingencies [Line Items] |
Schedule of Future Minimum Sublease Income under Non-Cancellable Sublease Agreements | Our lease commitments under this ground lease, which extends through 2071, were (in thousands):
2019 | $ | 2,359 |
2020 | 2,359 |
2021 | 2,359 |
2022 | 2,359 |
2023 | 2,359 |
Thereafter | 75,592 |
| $ | 87,387 |

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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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