Selected Quarterly Financial Data (Unaudited) - Selected Quarterly Financial Data (Unaudited) (Parenthetical) (Detail) - SL Delaware Holdings [Member] - RFL [Member] - Discontinued Operations, Disposed of by Sale [Member] - USD ($)	1 Months Ended
	Feb. 28, 2015	Nov. 17, 2014
Quarterly Financial Information [Line Items]
Aggregate cash consideration for sale of divested business		$ 20,000,000
Post-closing working capital adjustment received	$ 299,000