Discontinued Operations - Narrative (Details) (USD $)	1 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations		$ 14,389,000	$ 2,366,000	$ 3,030,000
Proceeds from Sale of Property, Plant, and Equipment		1,109,000	464,000	322,000
Gain (Loss) on Disposition of Property Plant Equipment		958,000	265,000	206,000
Goodwill, Impairment Loss			4,461,000
Other Asset Impairment Charges		884,000	952,000	0
Amount of Adjustment to Prior Period Gain (Loss) on Disposal		1,100,000	1,100,000	600,000
Glacier Park
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income from discontinued operations		13,295,000	1,241,000	2,406,000
Proceeds from Possessory Interest		25,000,000
Gain on Possessory Interest, before Tax		21,500,000
Gain on Possessory Interest, Net of Tax, Attributable to Parent		13,500,000
Gain on Possessory Interest, Net of Tax, Attributable to Noncontrolling Interest		2,700,000
Proceeds from Sale of Property, Plant, and Equipment	3,000,000
Gain (Loss) on Disposition of Property Plant Equipment	700,000
Impairment Charge, Including Disposal Group and Discontinued Operations			4,500,000
Goodwill, Impairment Loss			2,097,000
Disposal Group, Including Discontinued Operation, Impairment Charges		$ 0	$ 2,364,000	$ 0