Consolidated and Combined Statements of Financial Condition (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Accounts receivable, allowance for doubtful accounts	$ 1,548	$ 1,552
Investments at fair value, cost basis	$ 9,999us-gaap_InvestmentOwnedAtCost	$ 39,999us-gaap_InvestmentOwnedAtCost
Treasury Stock, Shares	135,906us-gaap_TreasuryStockShares	0us-gaap_TreasuryStockShares
Class A common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	19,793,132	19,770,893
Common Stock, Shares, Outstanding	19,657,226	19,770,893
Class B common stock
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common Stock, Shares Authorized	1,000,000,000	1,000,000,000
Common Stock, Shares, Issued	31,617,704	31,621,542
Common Stock, Shares, Outstanding	31,617,704	31,621,542

For an unclassified balance sheet, a valuation allowance for receivables due a company that are expected to be uncollectible.

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