Goodwill, Other Intangible Assets And Long-Lived Assets - Gross Carrying Amount and Accumulated Amortization of Other Intangible Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Mar. 31, 2019	Sep. 30, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 63,522	$ 67,404	$ 81,021
Accumulated Amortization	27,701	27,119	24,527
Tradenames and trademarks
Acquired Indefinite-lived Intangible Assets [Line Items]
Gross carrying amount	15,054	15,054	24,353
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	44,037	44,037	48,657
Accumulated Amortization	25,288	23,942	21,968
Favorable lease contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	0	3,882	3,882
Accumulated Amortization	0	1,016	657
Trademarks
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,435	2,435	2,435
Accumulated Amortization	790	645	499
Patents
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,466	1,466	1,164
Accumulated Amortization	1,124	1,059	999
Covenants not to compete
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	530	530	530
Accumulated Amortization	$ 499	$ 457	$ 404