Derivative Financial Instruments - Interest Rate Derivatives Designated and Non Designated (Detail) (Interest Rate Caps and Swaps [Member], USD $) In Thousands, unless otherwise specified	7 Months Ended
	Jul. 31, 2014
Not Designated as Hedging Instrument [Member] | Matures on Oct 2014 [Member]
Derivative [Line Items]
Derivative Maturity Period	2014-10
Strike Rate	1.00%
Notional Amount of Hedge	$ 5,753
Cost of Hedge	174
Estimated Fair Value of Hedge
Change in Hedge Valuations Included in Interest Expense
Not Designated as Hedging Instrument [Member] | Matures on Aug 2015 [Member]
Derivative [Line Items]
Derivative Maturity Period	2015-08
Strike Rate	3.00%
Notional Amount of Hedge	25,500
Cost of Hedge	10
Estimated Fair Value of Hedge	10
Change in Hedge Valuations Included in Interest Expense
Cash Flow Hedging [Member] | Matures on Aug 2014 [Member]
Derivative [Line Items]
Derivative Maturity Period	2014-08
Strike Rate	0.50%
Notional Amount of Hedge	12,955
Cost of Hedge	22
Estimated Fair Value of Hedge
Change in Hedge Valuations Included in Interest Expense	7
Cash Flow Hedging [Member] | Matures on May 2016 [Member]
Derivative [Line Items]
Derivative Maturity Period	2016-05
Strike Rate	0.50%
Notional Amount of Hedge	41,867
Cost of Hedge
Estimated Fair Value of Hedge	(22)
Change in Hedge Valuations Included in Interest Expense	10
Cash Flow Hedging [Member] | Matures on Oct 2016 [Member]
Derivative [Line Items]
Derivative Maturity Period	2016-10
Strike Rate	0.69%
Notional Amount of Hedge	150,000
Cost of Hedge
Estimated Fair Value of Hedge	(62)
Change in Hedge Valuations Included in Interest Expense	24
Cash Flow Hedging [Member] | Matures on Nov 2017 [Member]
Derivative [Line Items]
Derivative Maturity Period	2017-11
Strike Rate	4.00%
Notional Amount of Hedge	50,000
Cost of Hedge	165
Estimated Fair Value of Hedge	104
Change in Hedge Valuations Included in Interest Expense	(82)
Cash Flow Hedging [Member] | Matures on Nov 2018 [Member]
Derivative [Line Items]
Derivative Maturity Period	2018-11
Strike Rate	5.00%
Notional Amount of Hedge	50,000
Cost of Hedge	220
Estimated Fair Value of Hedge	96
Change in Hedge Valuations Included in Interest Expense	$ (152)