CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Jul. 01, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 116,466	$ 117,626
Trade receivables, net	398,547	364,050
Inventories	104,690	95,833
Prepaid assets	50,671	34,315
Other current assets	67,693	45,008
Total current assets	738,067	656,832
Property, plant and equipment, net	758,724	755,827
Goodwill	776,453	787,517
Client relationships and Other intangible assets, net	368,794	394,448
Deferred tax assets	30,494	28,746
Other assets	101,132	88,430
Total assets	2,773,664	2,711,800
Current liabilities:
Current portion of long-term debt and capital leases	27,225	27,313
Accounts payable	64,652	68,485
Accrued compensation	84,732	93,471
Deferred revenue	119,336	127,731
Accrued liabilities	99,128	84,470
Other current liabilities	27,362	26,500
Current liabilities of discontinued operations	1,636	1,623
Total current liabilities	424,071	429,593
Long-term debt, net and capital leases	1,116,278	1,207,696
Deferred tax liabilities	82,956	55,717
Other long-term liabilities	163,799	159,239
Long-term liabilities of discontinued operations	4,849	5,771
Total liabilities	1,791,953	1,858,016
Commitments and contingencies (Note 13)
Redeemable noncontrolling interest	15,317	14,659
Equity:
Preferred stock, $0.01 par value; 20,000 shares authorized; no shares issued and outstanding	0	0
Common stock, $0.01 par value; 120,000 shares authorized; 87,329 shares issued and 47,586 shares outstanding as of July 1, 2017, and 86,301 shares issued and 47,363 shares outstanding as of December 31, 2016	873	863
Additional paid-in capital	2,528,742	2,477,371
Retained earnings	266,033	165,303
Treasury stock, at cost 39,743 shares and 38,938 shares as of July 1, 2017, and December 31, 2016, respectively	(1,623,825)	(1,553,005)
Accumulated other comprehensive loss	(208,327)	(253,764)
Total equity attributable to common shareholders	963,496	836,768
Noncontrolling interests	2,898	2,357
Total equity	966,394	839,125
Total liabilities, redeemable noncontrolling interest and equity	2,773,664	2,711,800
Client relationships, net
Current assets:
Client relationships and Other intangible assets, net	299,348	320,157
Other intangible assets, net
Current assets:
Client relationships and Other intangible assets, net	$ 69,446	$ 74,291