Prepaid Expenses and Other Current Assets (Tables)

12 Months Ended

Dec. 31, 2017

Prepaid Expenses and Other Current Assets

Schedule of significant components of prepaid expenses and other current assets

(in thousands)	2017		2016
Prepaid expenses	$	65,159	84,173
Income taxes receivable		41,400	-
R&D state tax credit		22,642	-
Supplies inventory		17,072	17,105
Other		70,292	63,210
Total	$	216,565	164,488