Leases - Future minimum payments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Operating lease liabilities under Topic 842
Operating leases - Remaining 2021	$ 13,961
Operating leases - 2022	25,535
Operating leases - 2023	23,358
Operating leases - 2024	22,055
Operating leases - 2025	19,087
Operating leases - later years	52,626
Operating leases - Total	156,622
Less: Imputed interest	(20,009)
Operating lease liabilities	136,613	$ 152,588
Finance lease liabilities under Topic 842
Finance leases - Remaining 2021	1,666
Finance leases - 2022	3,402
Finance leases - 2023	3,492
Finance leases - 2024	3,589
Finance leases - 2025	3,702
Finance leases - later years	8,850
Finance leases - Total	24,701
Less: imputed interest	(3,821)
Finance lease liabilities	$ 20,880	$ 22,572

Amount of lessee's undiscounted obligation for lease payment for finance lease to be paid in fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

No definition available.