Exit Costs - Restructuring Reserve (Details) - Jefferies [Member] - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Restructuring Reserve [Roll Forward]
Expenses	$ 605	$ 28,570	$ 1,854	$ 28,570
Severance Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at December 31, 2015			4,805
Expenses	(103)	15,559	279	15,559
Payments			(5,084)
Liability at June 30, 2016	0		0
Other Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at December 31, 2015			0
Expenses	20	2,291	300	2,291
Payments			(300)
Liability at June 30, 2016	0		0
Contract Termination Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at December 31, 2015			0
Expenses	678	0	1,234	0
Payments			(1,234)
Liability at June 30, 2016	0		0
Restructuring Costs [Member]
Restructuring Reserve [Roll Forward]
Balance at December 31, 2015			4,805
Expenses			1,813
Payments			(6,618)
Liability at June 30, 2016	0		0
Accelerated Amortization of Restricted Stock and Restricted Cash Awards [Member]
Restructuring Reserve [Roll Forward]
Expenses	$ 10	$ 4,460	$ 41	$ 4,460