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Discontinued Operations - Narrative (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Sep. 30, 2014
Jan. 31, 2014
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Income (loss) from discontinued operations     $ (684) $ (394) $ 14,389
Proceeds from possessory interest and personal property - discontinued operations         28,000
Proceeds from Sale of Property, Plant, and Equipment     1,166 1,542 1,109
Gain (Loss) on Disposition of Property Plant Equipment     $ 54 $ 690 958
Amount of Adjustment to Prior Period Gain (Loss) on Disposal         1,100
Glacier Park          
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]          
Income (loss) from discontinued operations         $ 13,295
Proceeds from possessory interest and personal property - discontinued operations   $ 25,000      
Gain on Possessory Interest, before Tax   21,500      
Gain on Possessory Interest, Net of Tax, Attributable to Parent Only   13,500      
Gain on Possessory Interest, Net of Tax, Attributable to Noncontrolling Interest   $ 2,700      
Proceeds from Sale of Property, Plant, and Equipment $ 3,000        
Gain (Loss) on Disposition of Property Plant Equipment $ 700