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Fair Value of Financial Instruments - Changes in Fair Value of Swaps (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Change in fair value:
Recognized in earnings	$ 0	$ (5)	$ (6)	$ (7)
Recognized in other comprehensive income	478	(420)	51	(647)
Total change in fair value	$ 478	$ (425)	$ 45	$ (654)

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Changes in Fair Value [Abstract]

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Increase / (decrease) in fair value of interest rate swaps, net.

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Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 815



-SubTopic 10



-Section 50



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Amount after tax of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss).

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