Supplemental Cash Flow Information - Supplemental Cash Flow Information (Parenthetical) (Details) - USD ($) $ in Thousands  | 
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015  | 
Dec. 31, 2014  | 
Dec. 31, 2013  | 
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| Supplemental Cash Flow Elements [Abstract] | |||
| Cash paid, interest capitalized | $ 7,256 | $ 8,526 | $ 10,058 | 
| X | ||||||||||
- Definition Amount of interest costs capitalized disclosed as an adjusting item to interest costs incurred. No definition available. 
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| X | ||||||||||
- References No definition available. 
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