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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions	1 Months Ended	6 Months Ended
	Jul. 31, 2015	Jun. 30, 2015
Loss Contingencies [Line Items]
Period of time to achieve earnings and cash building targets		6 months
Accrued bonus liability		$ 10.7
Total estimated expense		$ 5.2
Subsequent Event | Common Stock
Loss Contingencies [Line Items]
Issued (in shares)	2,155,193

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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Number of shares issued pursuant to the terms of a deferred compensation arrangement.

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