Related Party Transactions (Details) (USD $)					3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended								6 Months Ended
	Jun. 30, 2014	Dec. 31, 2013	Jun. 30, 2014 Affiliated Entity	Dec. 31, 2013 Affiliated Entity	Jun. 30, 2014 Affiliated Entity Management Fee and Incentive Income	Jun. 30, 2013 Affiliated Entity Management Fee and Incentive Income	Jun. 30, 2014 Affiliated Entity Management Fee and Incentive Income	Jun. 30, 2013 Affiliated Entity Management Fee and Incentive Income	Jun. 30, 2014 Affiliated Entity Fees Payable	Dec. 31, 2013 Affiliated Entity Fees Payable	Jun. 30, 2014 Employees	Jun. 30, 2013 Employees	Jun. 30, 2014 Employees	Jun. 30, 2013 Employees	Dec. 31, 2013 Employees	Dec. 31, 2013 Starboard Value LP	Apr. 30, 2011 Starboard Value LP	Apr. 30, 2011 Starboard Value LP LIBOR	Jun. 30, 2014 Investor	Dec. 31, 2013 Investor	Jun. 30, 2014 Real Estate Equity Investment	Jun. 30, 2014 Employee Loans Minimum	Jun. 30, 2014 Employee Loans Maximum
Related Party Transaction [Line Items]
Fees receivable, net of allowance	$ 46,630,000	$ 45,067,000	$ 15,600,000	$ 18,900,000
Reimbursement to affiliated funds					400,000	500,000	800,000	1,000,000
Fees payable to related parties									1,600,000	1,700,000
Due from employees											9,100,000		9,100,000		6,000,000
Forgivable Loan Balances											6,300,000		6,300,000		3,800,000
Forgivable Loans, Vesting Period																						1 year	3 years
Amortization on Forgivable Loans											1,100,000	900,000	1,900,000	1,200,000
Credit agreement with related party, maximum loan amount																	3,000,000
Credit agreement with related party, interest rate																		3.75%
Credit agreement with related party, loan receivable																1,500,000
Due to Affiliate																			400,000	400,000
Real estate loan participation agreements																					$ 50,000,000