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

3 Months Ended

Mar. 31, 2018

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	March 31, 2018		December 31, 2017
Accounts receivable	$	110,712	$	143,244
Receivables under contractual arrangements	51,852		29,895
	162,564		173,139
Less allowances for doubtful accounts	4,486		4,468
Accounts receivable, net	$	158,078	$	168,671

Schedule of Other Current Assets [Table Text Block]

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

Other current assets	March 31, 2018		December 31, 2017
Refundable income taxes	$	1,229	$	587
Prepaid expense	13,735		15,893
Other	189		784
Total	$	15,153	$	17,264

Accrued expenses [Table Text Block]

Accrued expenses	March 31, 2018		December 31, 2017
Employee compensation	$	12,010	$	20,794
Accrued compensated absences	9,590		9,267
Self-insured medical claims	4,447		3,193
Income tax payable	623		3,443
Customer advances, deposits	72		1,672
Taxes, other than income	3,662		2,279
Other	1,908		2,168
Total	$	32,312	$	42,816

Other current liabilities [Table Text Block]

Other current liabilities	March 31, 2018		December 31, 2017
Note Payable	$	—	$	149
Current portion of:
Long-term debt	13,155		16,817
Self-insurance accruals	23,846		23,782
Total	$	37,001	$	40,748