Supplemental Disclosure of Statement of Cash Flow Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid	$ 13,633	$ 14,351
Income taxes paid, net	195	548
LCIF [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Interest paid	4,821	3,869
Income taxes paid, net	$ 27	$ 45