Other Assets (Finite-Lived Intangible Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Mar. 31, 2015
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 24,600	$ 12,800
Accumulated Amortization	12,774	11,613
Net Carrying Amount	11,826	1,187
Noncompete agreements
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,300	0
Accumulated Amortization	158	0
Net Carrying Amount	9,142	0
Trademarks and trade names
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	9,100	6,600
Accumulated Amortization	6,653	5,913
Net Carrying Amount	2,447	687
Sales agency relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,200	6,200
Accumulated Amortization	5,963	5,700
Net Carrying Amount	$ 237	$ 500