Annual report pursuant to Section 13 and 15(d)

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

v2.4.1.9
Consolidated Statement of Cash Flows Supplemental Disclosures (Net cash paid or received) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Supplemental Cash Flow Elements [Abstract]      
Interest paid, net of amounts capitalized $ 74,618us-gaap_InterestPaidNet $ 71,749us-gaap_InterestPaidNet $ 69,083us-gaap_InterestPaidNet