Annual report pursuant to Section 13 and 15(d)

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

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Consolidated Statement of Cash Flows Supplemental Disclosures (Net cash paid or received) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Supplemental Cash Flow Elements [Abstract]      
Interest paid, net of amounts capitalized $ 71,749 $ 69,083 $ 73,492