Discontinued Operations - Loss on Disposal (Details) - USD ($) $ in Thousands		3 Months Ended
	Jun. 04, 2014	Jul. 31, 2015	Jul. 31, 2014
Discontinued Operations and Disposal Groups [Abstract]
Cash consideration	$ 30,000		$ 30,000
Basis in net assets as of July 2, 2014			39,972
Costs incurred directly attributable to the transaction			1,039
Loss before income taxes			(11,011)
Income tax benefit			(282)
Loss on disposal of discontinued operations, net of taxes			(10,729)
Loss on disposal of discontinued operations, net of taxes, previously recognized			9,192
Loss on disposal of discontinued operations, net of tax, recognized in current period		$ 0	$ (1,537)