| Supplemental Cash Flow Information - Supplemental Cash Flow Information (Parenthetical) (Detail) (USD $) In Thousands, unless otherwise specified | 12 Months Ended | ||
|---|---|---|---|
| Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | |
| Cash paid, interest capitalized | $ 10,058 | $ 13,274 | $ 9,877 | 
| X | ||||||||||
| 
- Definition The amount of cash paid during the current period for interest that is capitalized. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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