Amounts Related to Derivative Financial Instruments Included in Unconsolidated Entities in Condensed Consolidated Balance Sheet (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015
Derivative Financial Instruments One
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 12,050
Strike	[2]	1.30%
Credit Spread	[2]	2.60%
Trade date		Jan. 17, 2013
Forward date		Jan. 15, 2015
Maturity date		Jan. 16, 2018
Fair value asset (liability)		$ (44)	$ (85)
Derivative Financial Instruments Two
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 37,446
Strike	[2]	2.70%
Credit Spread	[2]	2.50%
Trade date		Sep. 06, 2013
Forward date		Aug. 17, 2015
Maturity date		Jul. 10, 2018
Fair value asset (liability)		$ (878)	(1,472)
Derivative Financial Instruments Three
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 25,516
Strike	[2]	2.80%
Credit Spread	[2]	2.50%
Trade date		Sep. 06, 2013
Forward date		Aug. 17, 2015
Maturity date		Aug. 29, 2018
Fair value asset (liability)		$ (667)	(1,086)
Derivative Financial Instruments Four
Derivative [Line Items]
Notional amount of derivative contract	[3]	$ 10,422
Strike	[2]	3.00%
Trade date		Jun. 27, 2014
Forward date		Jun. 30, 2014
Maturity date		Jun. 30, 2017
Fair value asset (liability)			1
Derivative Financial Instruments Five
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 47,983
Strike	[2]	2.40%
Credit Spread	[2]	2.90%
Trade date		Aug. 15, 2014
Forward date		Jun. 01, 2016
Maturity date		Jun. 02, 2019
Fair value asset (liability)		$ (949)	(1,066)
Derivative Financial Instruments Six
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 82,370
Strike	[2]	2.30%
Credit Spread	[2]	2.40%
Trade date		Sep. 12, 2014
Forward date		Aug. 01, 2015
Maturity date		Jul. 15, 2019
Fair value asset (liability)		$ (1,512)	(2,283)
Derivative Financial Instruments Seven
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 6,876
Strike	[2]	1.20%
Credit Spread	[2]	2.30%
Trade date		Nov. 12, 2014
Forward date		Nov. 15, 2014
Maturity date		Oct. 15, 2017
Fair value asset (liability)		$ (17)	(37)
Derivative Financial Instruments Eight
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 175,000
Strike	[2]	1.60%
Credit Spread	[2]	2.00%
Trade date		Dec. 23, 2014
Forward date		Dec. 19, 2014
Maturity date		Feb. 19, 2019
Fair value asset (liability)		$ (992)	(1,694)
Derivative Financial Instruments Nine
Derivative [Line Items]
Notional amount of derivative contract	[1]	$ 134,258
Strike	[2]	1.70%
Credit Spread	[2]	2.00%
Trade date		Jan. 09, 2015
Forward date		Dec. 10, 2015
Maturity date		Dec. 22, 2019
Fair value asset (liability)		$ (976)	(1,795)
Derivative Financial Instruments Ten
Derivative [Line Items]
Notional amount of derivative contract	[3]	$ 260,000
Strike	[2]	1.50%
Trade date		Nov. 19, 2015
Forward date		Nov. 19, 2015
Maturity date		Nov. 30, 2018
Fair value asset (liability)		$ 600	$ 1,988
Derivative Financial Instruments Eleven
Derivative [Line Items]
Notional amount of derivative contract	[3]	$ 150,000
Strike	[2]	1.50%
Trade date		Mar. 01, 2016
Forward date		Mar. 01, 2016
Maturity date		Nov. 30, 2018
Fair value asset (liability)		$ 346

[1] Amounts related to interest rate swaps held by the Company, or its equity method investments, which are recorded at fair value and included in either other assets or other liabilities in the accompanying consolidated balance sheets.

[2] The all-in rates are equal to the sum of the Strike and Credit Spread detailed above.

[3] Amounts related to the interest rate caps held by the Company, or its equity method investments, which are recorded at fair value and included in other assets in the accompanying consolidated balance sheets.