Operating lease liability maturities (Details) $ in Thousands	Mar. 31, 2020 USD ($)
Lessee Disclosure [Abstract]
Operating lease liability payments, due 2020 (remaining after March 31, 2020)	$ 13,997
Operating lease liability payments, due 2021	12,541
Operating lease liability payments, due 2022	5,745
Operating lease liability payments, due 2023	3,602
Operating lease liability payments, due 2024	2,081
Operating lease liability payments, due thereafter	1,640
Total lease payments	39,606
Imputed interest	(3,816)	[1]
Total operating lease liability	$ 35,790
Weighted-average discount rate	6.70%

[1] ⁽¹⁾  The weighted-average discount rate used to determine the operating lease liability as of March 31, 2020, was 6.7 percent.