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Other Comprehensive Income - Summary of Other Comprehensive Income and Tax Impact (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Comprehensive Income Loss Net Of Tax Period Increase Decrease [Abstract]
Net unrealized gain (loss) on available-for-sale securities, net of income taxes	$ 42	$ (216)	$ 9	$ (175)
Net unrealized gain on interest rate swaps, net of income taxes	61	78	117	143
Foreign currency translation	(15)	(17)	(29)	(31)
Total other comprehensive income (loss)	$ 88	$ (155)	$ 97	$ (63)

X

- Definition

The effective portion of gains on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

+ References

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- Definition

Amount after tax and reclassification adjustments, of appreciation (loss) in value of unsold available-for-sale securities. Excludes amounts related to other than temporary impairment (OTTI) loss.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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