Supplemental Disclosures of Cash Flow Information and Noncash Activities (Tables)

6 Months Ended

Jun. 30, 2018

Additional Cash Flow Elements and Supplemental Cash Flow Information [Abstract]

Schedule of Cash Flow, Supplemental Disclosures

Supplemental disclosures of cash flow information are as follows:

	Three Months Ended June 30,				Six Months Ended June 30,
	2018		2017		2018		2017
	(in thousands)				(in thousands)
Cash paid for income taxes, net of refunds received	$	2,650	$	6,424	$	2,672	$	6,424
Cash paid for interest	93,861		93,874		102,410		102,613