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Fair Value of Financial Instruments - Changes in Fair Value of Swaps (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Increase (decrease) in fair value:
Recognized in earnings	$ (7)	$ 36	$ (1,332)
Recognized in other comprehensive income	2,897	(932)	(3,195)
Total	$ 2,890	$ (896)	$ (4,527)

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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