Fair Value Measurements Schedule of Fair Value Assets and Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation liability	$ 0	$ 0
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation asset	7,172	6,662
Non-qualified deferred compensation liability	(4,296)	(4,140)
Derivative contracts liability	(153)
Designated Derivative Contracts asset	950	1,365
Fair Value, Measurements, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-qualified deferred compensation asset	7,172	6,662
Non-qualified deferred compensation liability	(4,296)	(4,140)
Designated as Hedging Instrument | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Designated Derivative Contracts asset	950	1,365
Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Designated Derivative Contracts asset	950	1,365
Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts liability	(10)
Designated Derivative Contracts asset	0	$ 0
Not Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts liability	(10)
Derivatives designated as cash flow hedges | Designated as Hedging Instrument | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts liability	(143)
Derivatives designated as cash flow hedges | Designated as Hedging Instrument | Fair Value, Measurements, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative contracts liability	$ (143)