Stock Appreciation Rights Activity (Detail) - Jul. 18, 2015 - Stock Appreciation Rights - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	Total
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Shares, Balance at beginning of period	29
Number of shares, Balance at end of period	29
Weighted Average Grant Date Fair Value outstanding, at beginning of period	$ 8.47
Weighted Average Grant Date Fair Value outstanding, at end of period	$ 8.47
Outstanding unvested at beginning of period, Aggregate Liability	$ 362