Exit Costs - Restructuring Reserve (Details) - Jefferies [Member] $ in Thousands	9 Months Ended
	Dec. 31, 2015 USD ($)
Restructuring Reserve [Roll Forward]
Expenses	$ 73,094
Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0
Expenses	30,327
Payments	(25,522)
Ending balance	4,805
Other Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0
Expenses	2,774
Payments	(2,774)
Ending balance	0
Contract Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0
Expenses	11,247
Payments	(11,247)
Ending balance	0
Restructuring Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	0
Expenses	44,348
Payments	(39,543)
Ending balance	4,805
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Reserve [Roll Forward]
Expenses	7,922
Accelerated Amortization of Capitalized Software [Member]
Restructuring Reserve [Roll Forward]
Expenses	19,745
Impairments [Member]
Restructuring Reserve [Roll Forward]
Expenses	$ 1,079