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Fair Value Measurements - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Jun. 30, 2014	Dec. 31, 2013
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment of long-lived assets	$ 0	$ 0

- Definition

The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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