Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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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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Derivative Instruments and Hedging Activities - Schedule of Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Accumulated other comprehensive income:
Balance at December 31, 2013			$ 11
Unrealized gain on derivatives, net of tax	1,087	(1,127)	7	1,453
Balance at September 30, 2014	18		18
Gains (Losses) on Cash Flow Hedges [Member]
Accumulated other comprehensive income:
Balance at December 31, 2013			11
Other comprehensive loss before reclassifications			(1,189)
Amounts reclassified from accumulated other comprehensive income to interest expense			1,196
Unrealized gain on derivatives, net of tax			7
Balance at September 30, 2014	$ 18		$ 18