Summary of Significant Accounting Policies (Details)	3 Months Ended	12 Months Ended	15 Months Ended
	Mar. 31, 2016 segment	Dec. 31, 2015 segment	Mar. 31, 2016 facility	Oct. 07, 2013
Significant Accounting Policies [Line Items]
Number of reportable segments | segment	1	2
Number of brokerages having assets and liabilities sold | facility			21
RMCO, LLC
Significant Accounting Policies [Line Items]
Minority economic interest in RMCO (as a percent)	58.33%		58.33%	39.56%