Revenue from Contract with Customer (Disaggregation of Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 315,400	$ 295,901
Other operating sales and revenues	411	1,014
Sales and other operating revenues	315,811	296,915
Tobacco sales [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	275,142	268,057
Processing revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	16,230	18,434
Other sales and revenue from contracts with customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 24,028	$ 9,410