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

6 Months Ended

Jun. 30, 2012

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

Schedule of accounts receivable, net [Table Text Block]

The following comprise accounts receivable, net, and other:

Accounts receivable, net	June 30, 2012		December 31, 2011
Accounts receivable	$	87,399	$	82,076
Receivables under contractual arrangements	21,538		11,194
	108,937		93,270
Less allowances for doubtful accounts	2,657		2,475
Accounts receivable, net	$	106,280	$	90,795

Schedule of other current assets [Table Text Block]

The following comprise the amounts included in the balance sheet:

Other current assets	June 30, 2012		December 31, 2011
Refundable income taxes	$	2,884	$	2,602
Deferred income taxes	7,927		12,071
Prepaid expenses	5,999		6,968
Other	619		2,247
Total	$	17,429	$	23,888

Schedule of accrued expenses [Table Text Block]

Accrued expenses	June 30, 2012		December 31, 2011
Employee compensation	$	13,190	$	15,046
Accrued compensated absences	8,158		7,138
Self-insured medical claims	3,148		2,950
Customer advances, deposits	—		1,321
Taxes, other than income	2,771		2,622
Accrued litigation settlement	2,900		2,900
Other	2,769		2,146
Total	$	32,936	$	34,123