Accrued Expenses and Other Current Liabilities (Tables)

12 Months Ended

Dec. 31, 2016

Other Liabilities Disclosure [Abstract]

Schedule of Accrued Liabilities [Table Text Block]

Accrued Expenses and Other Current Liabilities (in thousands):

December 31,	2016		2015
Payroll and related employee benefits	$	53,802	$	56,860
Accrued insurance	44,471		41,154
Performance guarantees (see Note 1)	83,110		65,514
Other	37,204		37,407
Total	$	218,587	$	200,935