Indebtedness (Senior Subordinated Notes Narrative) (Details) (USD $)	3 Months Ended			12 Months Ended
	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012
Debt Instrument [Line Items]
Loss on the extinguishment of debt, before tax				$ 9,150,000	$ 0	$ 0
Loss on the extinguishment of debt, net of tax	0	0	0
7.125% Senior Subordinated Notes Maturing 2018 [Member] | Senior Subordinated Notes [Member]
Debt Instrument [Line Items]
Senior subordinated notes, carrying value	215,000,000			215,000,000
Debt instrument, interest rate	7.125%			7.125%
Debt instrument, maturity date				Oct. 01, 2018
Call feature description				The 2018 Senior Subordinated Notes had a redemption provision which permitted the Company, at its option, to call the 2018 Senior Subordinated Notes at scheduled dates and prices
First scheduled optional redemption date				Oct. 01, 2013
Debt instrument, redemption price, percentage				103.563%
Loss on the extinguishment of debt, before tax				9,100,000
Loss on the extinguishment of debt, net of tax				$ 5,646,000