Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Jan. 27, 2018	Jan. 28, 2017
Cash flows from operating activities:
Net income (loss)	$ (104,408)	$ 35,451
Adjustments to reconcile net income to net cash flows from operating activities:
Depreciation and amortization (including amortization of deferred financing fees)	83,306	91,545
Stock-based compensation expense	4,788	5,534
Impairment charges	135,436	93
Deferred taxes	(25,667)
Loss on disposal of property and equipment	589	1,179
Net decrease in other long-term liabilities	(7,599)	(8,895)
Net (increase) decrease in other non-current assets	(3,614)	1,327
Changes in operating assets and liabilities, net	25,302	32,277
Net cash flows provided by operating activities	108,133	158,511
Cash flows from investing activities:
Purchases of property and equipment	(69,971)	(73,665)
Net cash flows used in investing activities	(69,971)	(73,665)
Cash flows from financing activities:
Proceeds from credit facility	877,822	897,878
Payments on credit facility	(882,917)	(926,878)
Cash dividends paid	(32,719)	(32,955)
Treasury stock repurchase plan		(23,281)
Purchase of treasury stock related to stock-based compensation	(653)	(1,580)
Payment of new credit facility related fees		(474)
Proceeds from exercise of common stock options		312
Cash dividends paid for long-term incentive awards	(188)	(78)
Net cash flows used in financing activities	(38,655)	(87,056)
Net decrease in cash and cash equivalents	(493)	(2,210)
Cash and cash equivalents at beginning of period	11,993	13,838
Cash and cash equivalents at end of period	11,500	11,628
Changes in operating assets and liabilities, net:
Receivables, net	4,342	54,483
Merchandise inventories, net	(28,146)	(76,620)
Prepaid expenses and other current assets	22,641	43,718
Accounts payable, accrued liabilities and gift card liabilities	26,465	10,696
Changes in operating assets and liabilities, net	25,302	32,277
Interest	5,729	4,125
Income taxes (net of refunds)	(1,416)	(18,027)
Non-cash financing activity:
Accrued cash dividends		50
Accrued dividends for long-term incentive awards	$ 938	$ 514