Debt - Components of interest expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Debt Instrument [Line Items]
Interest incurred on capital lease and other financing obligations	$ 30	$ 16
Interest expense incurred on ABL facilities and Notes	8,615	8,980
Amortization of deferred financing costs	1,050	904
Amortization of original issue discount	153	122
Interest expense, net	9,849	10,022
Senior Secured Notes 2024
Debt Instrument [Line Items]
Amortization of deferred financing costs	738	589
New ABL Facility
Debt Instrument [Line Items]
Amortization of deferred financing costs	212	214
Algeco ABL facility
Debt Instrument [Line Items]
Amortization of deferred financing costs	$ 101	$ 101