Consolidated Statement of Changes in Shareholders' Equity - 6 months ended Oct. 29, 2016 - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Gains	Retained Earnings	Treasury Stock at Cost
Balance at Apr. 30, 2016	$ 603,510	$ 112	$ 1,738,034	$ 151	$ (24,349)	$ (1,110,438)
Net loss	(34,825)				(34,825)
Postretirement plan liability, net of tax	47			47
Exercise of 31 common stock options	312		312
Stock options and restricted stock tax expense	(388)		(388)
Stock-based compensation expense	3,162		3,162
Cash dividends declared	(22,104)				(22,104)
Accrued dividends for long-term incentive awards	(41)				(41)
Purchase of treasury stock related to stock-based compensation, 91 shares	(1,093)					(1,093)
Treasury stock repurchase plan, 1,709 shares	(19,788)					(19,788)
Balance at Oct. 29, 2016	$ 528,792	$ 112	$ 1,741,120	$ 198	$ (81,319)	$ (1,131,319)