Derivative Financial Instruments - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified		1 Months Ended	9 Months Ended
	Jan. 26, 2013 Interest Rate Cap Agreements, Maturing July 2020	Aug. 31, 2012 Interest Rate Cap Agreements, Maturing July 2020 Terminated and replaced with offsetting and identical interest rate cap agreements	Jan. 26, 2013 Interest Rate Cap
Derivative [Line Items]
Notional amount of derivatives	$ 75,000	$ 75,000	$ 500,000
Maturity date		2020-07	2019-12
Number of interest rate caps purchased by PDC Funding			1
Number of interest rate caps sold			1