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Leases (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Leases [Abstract] |  |  |
Operating lease ROU assets | $ 144,326 | $ 0 |
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List] | us-gaap:OperatingLeaseRightOfUseAsset |  |
Current operating lease liabilities | $ 39,349 | 0 |
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List] | us-gaap:AccruedLiabilitiesCurrent |  |
OperatingLeaseLiabilityNoncurrent | $ 105,701 | 0 |
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List] | us-gaap:OperatingLeaseLiabilityNoncurrent |  |
Weighted average remaining lease term for operating leases | 6 years |  |
Weighted average discount rate for operating leases | 5.00% |  |
Build-to-Suit Assets [Abstract] |  |  |
Build-to-suit building | $ 784,644 | 787,534 |
Deposit paid to landlord | 46,894 | 41,986 |
Components of Lease Expense [Abstract] |  |  |
Operating lease cost | 51,072 |  |
Variable lease cost | 3,387 |  |
Short-term lease cost | 169 |  |
Sublease income | (5,743) |  |
Total lease expense | 48,885 |  |
Supplemental Cash Flow Information Related to Leases [Abstract] |  |  |
Operating cash outflow | 54,993 |  |
ROU assets obtained in exchange for lease liabilities | 184,502 |  |
Maturities of Operating Lease Liabilities [Abstract] |  |  |
2020 | 45,942 |  |
2021 | 38,545 |  |
2022 | 23,822 |  |
2023 | 17,949 |  |
2024 | 12,876 |  |
Thereafter | 31,368 |  |
Total | 170,502 |  |
Less: Imputed interest | 25,452 |  |
Total lease liability | 145,050 |  |
Additional lease liabilities not yet commenced | $ 8,900 |  |
Minimum Future Operating Leases [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 |
Minimum Future Financing Obligations [Abstract] |  |  |
2019 |  | 726 |
2020 |  | 748 |
2021 |  | 757 |
2022 |  | 770 |
2023 |  | 794 |
Thereafter |  | 1,148 |
Total minimum lease payments |  | 4,943 |
Rent and Interest Expense [Abstract] |  |  |
Rent expense for operating leases |  | 50,400 | $ 50,700
Interest expense associated with financing obligations |  | 200 | $ 200
Build-to-Suit Building [Member] |  |  |
Build-to-Suit Assets [Abstract] |  |  |
Build-to-suit building |  | 19,400 |
Financing obligation |  | 9,900 |
Deposit paid to landlord |  | 9,900 |
Tenant incentive asset |  | 4,000 |
Deferred tenant incentive liability |  | $ 3,700 |
Minimum [Member] |  |  |
Leases [Abstract] |  |  |
Remaining lease terms | 1 year |  |
Maximum [Member] |  |  |
Leases [Abstract] |  |  |
Remaining lease terms | 25 years |  |
Extension period for leases | 20 years |  |
Termination period for leases | 1 year |  |

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- Definition This item represents the deferred credit for an incentive or inducement received by a lessee from a lessor, in order to motivate the lessee to enter the lease agreement, which incentive or inducement is to be recognized as a reduction of rental expense over the lease term. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e39896-112707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 55 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=77891322&loc=d3e41620-112719 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 25 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77902458&loc=d3e40010-112707 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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- Definition Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=82846649&loc=d3e38371-112697 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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