Assets Held for Sale - Additional Information (Detail) $ in Thousands	3 Months Ended
Mar. 31, 2016 USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Purchase price for asset sale	$ 9,000
Gain on sale of assets	$ 5,828

Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value.

No definition available.

Name:	us-gaap_GainLossOnSalesOfAssetsAndAssetImpairmentCharges
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration