Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2017	Apr. 02, 2016
Cash flows from operating activities
Net income	$ 28,208	$ 16,564
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization charges	16,532	15,808
Loss on disposal of property, plant and equipment	695	8
Deferred income tax provision	13,758	1,013
Stock-based compensation expense	5,151	2,739
Forgiveness of notes receivable from stockholders		32
Amortization of debt issuance costs and original issue discount	566	2,587
Contingent consideration fair value adjustment	(6,582)
Other changes in operating assets and liabilities (See Note 22)	(18,427)	1,702
Other	(441)	(320)
Net cash provided by operating activities	39,460	40,133
Cash flows used in investing activities
Purchases of property, plant and equipment	(12,329)	(9,762)
Net cash used in investing activities	(12,329)	(9,762)
Cash flows from financing activities
Borrowings on revolving line of credit	385	64,545
Repayments on revolving line of credit	(385)	(64,360)
Repayments on term loans and capital leases	(178)	(3,294)
Repayments on other long-term liabilities	(3,906)	(6,558)
Dividends and dividend equivalents	(12,712)
Redemption of stock	(900)	(779)
Retirement of stockholder notes receivable, net of issuance	183	2,630
Payment of deferred initial public offering costs		(162)
Net cash used in financing activities	(17,513)	(7,978)
Net increase in cash and cash equivalents	9,618	22,393
Cash and cash equivalents, beginning of period	104,440	4,505
Cash and cash equivalents, end of period	$ 114,058	$ 26,898