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Leases (Tables) | 9 Months Ended
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Sep. 30, 2019
Leases [Abstract] |
Components of Lease Cost | The components of lease cost for the periods ended September 30, 2019 were as follows:
(in thousands) | Three Months Ended September 30, 2019 |  | Nine Months Ended September 30, 2019
Operating lease cost | $ | 5,481 |  |  | $ | 16,263 |
Short-term lease cost | 522 |  | 1,996
Variable lease cost | 501 |  | 1,331
Total lease cost | $ | 6,504 |  |  | $ | 19,590 |
Future Minimum Lease Payments | Future minimum lease payments under operating leases as of September 30, 2019 were as follows:
(in thousands) |  |  |
Year Ending December 31, |  |  |
2019 (excluding the nine months ended September 30, 2019) | $ | 5,401 |  |  |
2020 | 17,384 |  |
2021 | 14,518 |  |
2022 | 10,824 |  |
2023 | 7,817 |  |
Thereafter | 28,947 |  |
Total future minimum lease payments (a) | 84,891 |  |
Less: Interest | (14,358) |  |
Present value of operating lease liabilities | $ | 70,533 |  |  |
(a) Refer to the Company’s 2018 Annual Report on Form 10-K for disclosure of future minimum lease payments at December 31, 2018 under ASC Topic 840, the accounting standard applicable to leases prior to the adoption of Topic 842.

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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918701-209980 + Details
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