Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Cash flows from operating activities:
Net income	$ 49,613	$ 89,305	$ 78,713
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	30,893	21,704	16,730
Loss on sale of discontinued operations			1,222
Loss on sale/disposition of assets	267	150	315
Provision for/(recoveries of) losses on accounts receivable	122	(214)	720
Change in disposal group assets and liabilities			(1,215)
Deferred income taxes	2,341	(1,463)	4,009
Stock-based compensation expense	5,808	8,212	4,073
Changes in operating assets and liabilities (net effect of acquisitions):
Accounts receivable	10,983	(9,588)	1,505
Inventories	25,662	(23,744)	(7,702)
Prepaid expenses and other current assets	(569)	(1,856)	(285)
Income tax receivable/(payable)	8,965	(1,534)	(3,384)
Accounts payable	(7,345)	6,468	2,602
Accrued payroll	(9,525)	2,720	3,489
Accrued taxes other than income	(86)	10	1,079
Accrued profit sharing	(4,895)	1,473	1,547
Accrued expenses	1,447	(477)	(5,125)
Accrued warranty	891	(244)	408
Other assets	(348)	(356)	(1,930)
Other non-current liabilities	583	(360)	1,327
Net cash provided by operating activities	114,807	90,206	98,098
Cash flows from investing activities:
Proceeds from sale of the net assets of SWSS LLC			7,500
Refunds of/(payments for) deposits on machinery and equipment	1,431	(9,269)
Receipts from note receivable	81	77	73
Payments to acquire patents and software	(392)	(243)	(102)
Proceeds from sale of property and equipment	264	101	1,040
Payments to acquire property and equipment	(28,199)	(53,282)	(41,421)
Net cash used in investing activities	(186,057)	(62,616)	(32,910)
Cash flows from financing activities:
Proceeds from loans and notes payable	175,000	101,584	1,753
Cash paid for debt issue costs	(2,558)	(3,791)
Payments on capital lease obligation	(596)	(596)	(600)
Payments on notes payable	(100,000)	(45,143)	(8,195)
Proceeds from Economic Development Incentive Program	640	722
Payments to acquire treasury stock	(30,040)	(115,887)	(20,000)
Proceeds from exercise of options to acquire common stock, including employee stock purchase plan	3,103	3,315	4,808
Payroll taxes paid as a result of restricted stock unit withholdings	(1,708)	(2,068)	(209)
Excess tax benefit of stock-based compensation	771	2,647	1,025
Net cash provided by/(used in) financing activities	44,612	(59,217)	(21,418)
Net (decrease)/increase in cash and cash equivalents	(26,638)	(31,627)	43,770
Cash and cash equivalents, beginning of period	68,860	100,487	56,717
Cash and cash equivalents, end of period	42,222	68,860	100,487
Supplemental disclosure of cash flow information Cash paid for:
Interest	8,617	7,688	5,295
Income taxes	16,926	$ 48,778	$ 44,087
Tri Town Precision Plastics Inc
Cash flows from investing activities:
Payments to acquire business, net of cash acquired	(23,805)
BTI Acquisition
Cash flows from investing activities:
Payments to acquire business, net of cash acquired	$ (135,437)