Fair Value Measurements Schedule of Fair Value Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation asset	$ 6,569	$ 7,172
Non-qualified deferred compensation liability	(4,802)	(4,296)
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation asset	6,569	7,172
Non-qualified deferred compensation liability	(4,802)	(4,296)
Designated Derivative Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts asset	1,850	950
Derivative contracts liability		(143)
Designated Derivative Contracts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts asset	1,850	950
Derivative contracts liability		(143)
Non-Designated Derivative Contracts
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts asset	94
Derivative contracts liability	(5)	(10)
Non-Designated Derivative Contracts | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts asset	94
Derivative contracts liability	$ (5)	$ (10)