Leases - Operating Lease Maturity (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Topic 842
2020	$ 9,725
2021	8,889
2022	8,420
2023	8,131
2024	7,549
Thereafter	78,124
Total undiscounted cash flows	120,838
Discount on cash flows	32,344
Total operating lease liabilities	$ 88,494
Topic 840
2019		$ 9,389
2020		8,199
2021		6,339
2022		4,929
2023		3,711
Thereafter		12,592
Total		$ 45,159

Amount of lessee's undiscounted obligation for lease payments for operating lease.

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