Goodwill and Other Intangible Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Weighted-average amortization period (in years)	13 years	13 years
Gross carrying amount			$ 112,873	$ 109,604
Accumulated amortization			45,302	37,316
Net carrying amount			67,571	72,288
Intangibles not subject to amortization
Goodwill	$ 127,934	$ 127,934	127,934	127,934
Trademarks			15,455	15,455
Total goodwill and other intangible assets			$ 210,960	$ 215,677
Changes in goodwill
Goodwill, gross, balance at the beginning of the period	143,765	143,765
Goodwill, gross, balance at the end of the period	143,765	143,765
Accumulated impairment, balance at the beginning of the period	(15,831)	(15,831)
Accumulated impairment, balance at the end of the period	(15,831)	(15,831)
Goodwill, net, balance at the beginning of the period	127,934	127,934
Goodwill, net, balance at the end of the period	$ 127,934	$ 127,934