Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Cash Flows Supplemental Disclosures (Net cash paid or received) (Details)

v3.5.0.2
Consolidated Statements of Cash Flows Supplemental Disclosures (Net cash paid or received) (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Supplemental Cash Flow Elements [Abstract]    
Interest paid including capitalized interest $ 44,068 $ 35,056