Business Combinations, Discontinued Operations and Related Transactions - Recognition Based on Preliminary Analysis of Provisional Amounts (Parenthetical) (Detail) (Deferred payment, Basic Management Inc And Landwell, Face value, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013
Deferred payment | Basic Management Inc And Landwell | Face value
Business Combinations Discontinued Operations And Related Transactions [Line Items]
Promissory note payable	$ 11.1