Preferred Equity Investments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	7 Months Ended	12 Months Ended
	Jul. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Equity (loss) income	$ 12,622	$ 22,641	$ 14,843
Trust Preferred Securities [Member]
Schedule of Equity Method Investments [Line Items]
Equity (loss) income	$ 582	$ 613	$ 0