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Segment Information (Reconciliation of Revenue from Segments to Consolidated) (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Segment Reporting [Abstract]                      
Segment Margin                 $ 182,762 $ 367,400 $ 329,510
Depreciation and amortization                 (150,939) (183,376) (187,918)
General and administrative                 (73,903) (103,385) (94,183)
Bad debt (expense) recovery                 188 (1,445) (767)
Impairment charges                 (129,152) (73,025) (54,292)
Gain on dispositions of property and equipment, net                 (4,344) (1,859) (1,421)
Gain on sale of fishing and rental services operations                 0 (10,702) 0
Gain on litigation                 0 5,254 0
Income (loss) from operations $ (65,286) $ (17,972) $ (75,108) $ (8,334) $ (48,672) $ 32,804 $ 21,917 $ 17,935 $ (166,700) $ 23,984 $ (6,229)