Leases - Summary of minimum future rental payments required (Details) $ in Thousands	Mar. 31, 2019 USD ($)
Operating Leases
2019	$ 12,635
2020	17,144
2021	16,992
2022	16,855
2023	11,043
Thereafter	140,403
Total undiscounted rental payments	215,072
Less imputed interest	(107,957)
Lease liabilities	107,115
Operating Leases
2019	16,627
2020	17,183
2021	17,124
2022	17,450
2023	11,390
Thereafter	140,562
Total undiscounted rental payments	220,336
Finance Leases
2020	1,699
2021	2,106
2022	10,440
2023	2,418
2024	0
Thereafter	0
Total undiscounted rental payments	16,663
Less imputed interest	(1,673)
Total lease liabilities	14,990
Finance Leases
2019	2,106
2020	2,106
2021	10,440
2022	2,418
2023	0
Thereafter	0
Total undiscounted rental payments	$ 17,070

Amount of minimum lease payments for capital leases.

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Present value of lessee's discounted obligation for lease payments from finance lease.

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Amount of lessee's undiscounted obligation for lease payments for finance lease, due in remainder of fiscal year following latest fiscal year ended.

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