Stock-Based Compensation Restricted Stock Units (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014	Jun. 26, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unearned compensation	$ 463
Compensation expense	$ 2,874	$ 3,194	$ 3,222
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock units issued before restrictions lapse (in shares)	0
Award vesting period (in years)	3 years
Restricted Stock Units, Other, Vesting in First Year, percent	50.00%
Restricted Stock Units, Other, Vesting in Second and Third Years, percent	25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Balance at (in shares)	58,000	63,000	43,000
Granted (in shares)	58,000	22,000	64,000
Vested (in shares)	(25,000)	(21,000)	(42,000)
Forfeited (in shares)	(2,000)	(6,000)	(2,000)
Balance at (in shares)	89,000	58,000	63,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Balance at, Weighted Average Grant Date Fair Value (usd per share)	$ 34.18	$ 38.50	$ 45.59
Granted, Weighted Average Grant Date Fair Value (usd per share)	14.73	27.20	38.50
Vested, Weighted Average Grant Date Fair Value (usd per share)	35.16	38.50	45.59
Forfeited, Weighted Average Grant Date Fair Value (usd per share)	38.50	38.50	38.50
Balance at, Weighted Average Grant Date Fair Value (usd per share)	$ 21.28	$ 34.18	$ 38.50
Unearned compensation	$ 666
Compensation expense	$ 1,113	$ 859	$ 1,100
Exercise price (USD per share)				$ 60.00