Dividends - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		8 Months Ended
	Oct. 14, 2016	Sep. 11, 2016	Sep. 06, 2015	Sep. 11, 2016	Sep. 06, 2015	Jan. 03, 2016	[1]
Dividends Payable [Line Items]
Dividends declared per share		$ 0.38	$ 0.31	$ 1.14	$ 0.93
Common stock dividends accrued		$ 18,547		$ 18,547		$ 557
Dividend declared date		Jul. 20, 2016
Record date of dividend		Sep. 15, 2016
Dividend payable date		Sep. 30, 2016
Subsequent Event [Member]
Dividends Payable [Line Items]
Dividends declared per share	$ 0.38
Record date of dividend	Dec. 15, 2016
Dividend payable date	Dec. 30, 2016

[1] The balance sheet at January 3, 2016 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.