Accounts Receivable, Net and Supplemental Balance-Sheet Information (Tables)

6 Months Ended

Jul. 01, 2017

Accounts Receivable, Net and Supplemental Balance-Sheet Information [Abstract] [Abstract]

Accounts receivable, net [Table Text Block]

Accounts receivable, net, consisted of the following:

Accounts receivable, net	July 1, 2017		December 31, 2016
Accounts receivable	$	126,751	$	128,202
Receivables under contractual arrangements	34,293		21,541
	161,044		149,743
Less allowances for doubtful accounts	3,489		3,609
Accounts receivable, net	$	157,555	$	146,134

Schedule of Other Current Assets [Table Text Block]

The following items comprise the amounts included in the balance sheets:

Other current assets	July 1, 2017		December 31, 2016
Refundable income taxes	$	94	$	548
Prepaid expense	9,251		14,493
Other	299		1,315
Total	$	9,644	$	16,356

Accrued expenses [Table Text Block]

Accrued expenses	July 1, 2017		December 31, 2016
Employee compensation	$	14,189	$	18,438
Accrued compensated absences	9,663		9,215
Self-insured medical claims	5,428		2,961
Income tax payable	3,744		953
Customer advances, deposits	756		2,997
Taxes, other than income	2,431		2,166
Other	1,411		929
Total	$	37,622	$	37,659