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Subsequent Event	9 Months Ended
	Sep. 30, 2012
Subsequent Event [Abstract]
Subsequent Events	18. Subsequent Events On October 1, 2012, the Company completed the acquisition of the business of Rampart Investment Management (“Rampart”), for $0.8 million in cash, which included transaction costs. Rampart is a registered investment advisor that specializes in customized options strategies for institutional and high-net-worth clients by providing a systematic and disciplined options solutions to help its clients generate incremental yield, reduce downside risk and mitigate market volatility. The Company anticipates completing the preliminary purchase price allocation in the fourth quarter of 2012.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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