Stock-Based Compensation Unvested Stock Option Awards (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Mar. 31, 2015 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares [Roll Forward]
Unvested, Beginning Balance (in shares) | shares	362
Forfeited (in shares) | shares	(1)
Vested (in shares) | shares	(195)
Unvested, Ending Balance (in shares) | shares	166
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Unvested, Weighted Average Grant Date Fair Value (usd per share) | $ / shares	$ 16.85
Forfeited, Weighted Average Exercise Price (usd per share) | $ / shares	17.67
Vested, Weighted Average Exercise Price (usd per share) | $ / shares	17.15
Unvested, Weighted Average Grant Date Fair Value (usd per share) | $ / shares	$ 16.49
Unvested, Aggregate Grant Date Fair Value	$ 6,103
Forfeited, Aggregate Grant Date Fair Value	(18)
Vested, Aggregate Grant Date Fair Value	(3,353)
Unvested, Aggregate Grant Date Fair Value	2,732
Unearned compensation	$ 1,871
Weighted Average Remaining Contractual Term, (in years)	1 year 8 months 12 days