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Commitments, contingencies and guarantees (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Components of Lease Expense [Text Block] | The components of net lease cost, which were recorded in operating expenses, were as follows:
|  |  | Year ended December 31,
(in thousands) |  |  |  |  | 2020 (1) |  | 2019 (1) |  | 2018 (2)
Operating lease cost (1) |  |  |  |  | $ | 14,815 |  |  | $ | 17,811 |  |  | $ | 13,649 |
Sublease income |  |  |  |  | (526) |  |  | (656) |  |  | (765) |
Right-of-use asset impairment cost |  |  |  |  | 12,460 |  |  | — |  |  | — |
Net lease cost |  |  |  |  | $ | 26,749 |  |  | $ | 17,155 |  |  | $ | 12,884 |
(1) Operating lease cost includes variable lease costs, which are immaterial. (2) Represents rent expense and sublease income under ASC 840, Leases.
Schedule of Supplemental Cash Flow Information Related To Leases [Text Block] | Supplemental cash flow information related to leases was as follows:
|  | Year ended December 31,
(in thousands) |  | 2020 |  | 2019
Cash paid for amounts included in the measurement of lease liabilities |  |  |  |
Operating cash flows from operating leases |  | $ | 14,310 |  |  | $ | 14,015 |
Right-of-use assets obtained in exchange for operating lease liabilities |  | 1,343 |  |  | 13,287 |
Operating lease modifications to decrease right-of-use assets |  | (2,251) |  |  | — |
Supplemental balance sheet information related to leases was as follows:
|  | December 31, 2020 |  | December 31, 2019
Weighted-average remaining lease term (in years) - operating leases |  | 5.53 |  | 6.44
Weighted-average discount rate - operating leases |  | 6.2% |  | 6.2%
Schedule of Maturities of Lease Liabilities [Text Block] | As of December 31, 2020, maturities of operating lease liabilities were as follows:
(in thousands) |  | December 31, 2020
2021 |  | $ | 12,794 |
2022 |  | 12,945 |
2023 |  | 11,924 |
2024 |  | 11,519 |
2025 |  | 11,306 |
Thereafter |  | 12,626 |
Total lease payments |  | 73,114 |
Less: Imputed interest |  | (12,112) |
Present value of lease liabilities |  | $ | 61,002 |

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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=121609121&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=121609121&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure for lessee's operating leases. Includes, but is not limited to, description of lessee's operating lease, existence and terms of renewal or purchase options and escalation clauses, restrictions imposed by lease, such as those concerning dividends, additional debt, and further leasing, rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 1,3) -URI http://asc.fasb.org/extlink&oid=121580752&loc=d3e38371-112697 Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121573735&loc=d3e41499-112717 Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248 Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121573735&loc=d3e41502-112717 Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121549808&loc=d3e36991-112694 + Details
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