Quarterly report pursuant to Section 13 or 15(d)

财产及设备 (Schedule Of Asset Retirement Obligation) (Details)

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财产及设备 (Schedule Of Asset Retirement Obligation) (Details) (USD $)
In Thousands, unless otherwise specified
3个月结束 9月结束
9月. 30, 2014
9月. 30, 2013
9月. 30, 2014
9月. 30, 2013
12月. 31, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]          
Asset retirement obligation, beginning of period     $ 15,083 $ 13,275  
负债已经发生     5,713 1,771  
负债结算     (4,972) (807)  
增长的费用 192 180 569 529  
Asset retirement obligation as of end of period 16,393 14,768 16,393 14,768  
小电流部分 75 780 75 780 795
Asset retirement obligation, long-term $ 16,318 $ 13,988 $ 16,318 $ 13,988 $ 14,288