Subsequent Events (Details) (USD $)	3 Months Ended															1 Months Ended	12 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Mar. 31, 2013	Jun. 30, 2014 Subordinated Debt [Member]	Mar. 31, 2014 Subordinated Debt [Member]	Dec. 31, 2013 Subordinated Debt [Member]	Sep. 30, 2013 Subordinated Debt [Member]	Mar. 31, 2013 Subordinated Debt [Member]	May 09, 2014 Subordinated Debt [Member]	Feb. 21, 2014 Subordinated Debt [Member]	Jan. 22, 2014 Subordinated Debt [Member]	Oct. 18, 2013 Subordinated Debt [Member]	Aug. 01, 2013 Subordinated Debt [Member]	Mar. 08, 2013 Subordinated Debt [Member]	Mar. 10, 2010 Subordinated Debt [Member]	Apr. 30, 2013 Term Loan [Member]	Dec. 31, 2013 Term Loan [Member]	Mar. 31, 2014 Term Loan [Member]	Jul. 31, 2013 Term Loan [Member]	Apr. 29, 2013 Term Loan [Member]	Mar. 31, 2014 LIBOR [Member] Minimum [Member] Term Loan [Member]	Apr. 29, 2013 LIBOR [Member] Minimum [Member] Term Loan [Member]	Mar. 31, 2014 LIBOR [Member] Maximum [Member] Term Loan [Member]
Subsequent Event [Line Items]
Cash dividends declared per common share	$ 0.0425	$ 0.0425	$ 0.0000
Debt Instrument, Repurchased Face Amount					$ 50,000,000				$ 42,500,000	$ 20,000,000	$ 30,000,000	$ 155,000,000	$ 324,000,000	$ 50,000,000	$ 28,500,000
Redemption Premium, percentage of par value									104.178%	104.178%		104.178%	106.268%	106.268%
Extinguishment of Debt, Accrued Interest Paid to Lenders									400,000	1,900,000		200,000	12,000,000	2,500,000
Proceeds from Issuance of Long-term Debt																1,350,000,000
Debt, short-term and long-term					42,500,000	92,500,000											1,528,900,000	1,525,100,000
Discount, percent of par																			99.25%	99.75%
Variable Interest Rate Margin																					2.25%	2.25%	2.50%
Quarterly amortization payment of original principal, Percent																		0.25%
Net loss on extinguishments of long-term debt		5,400,000	3,900,000	2,200,000	2,700,000	8,500,000	24,600,000	3,900,000									10,300,000
Extinguishment of Debt, Fees Paid to Lenders									1,800,000	2,100,000		6,500,000	20,300,000	3,100,000
Write off of Deferred Debt Issuance Cost				$ 400,000	$ 600,000	$ 2,000,000	$ 4,300,000	$ 800,000