Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
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-Section 50
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Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
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-Name Accounting Standards Codification
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Summary of Selected Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Dec. 31, 2016
Property and Equipment
Land, property and equipment, gross	$ 78,639		$ 55,451
Less accumulated depreciation and amortization	(17,845)		(13,927)
Land, property and equipment, net	60,794		41,524
Impairment for long-lived assets
Impairment losses for long-lived assets	$ 0	$ 0
Buildings \| Minimum
Property and Equipment
Estimated Useful Life	30 years
Buildings \| Maximum
Property and Equipment
Estimated Useful Life	50 years
Leasehold improvements \| Minimum
Property and Equipment
Estimated Useful Life	5 years
Leasehold improvements \| Maximum
Property and Equipment
Estimated Useful Life	20 years
Land
Property and Equipment
Land, property and equipment, gross	$ 5,215		4,576
Building and improvements
Property and Equipment
Land, property and equipment, gross	52,096		37,580
Furniture, fixtures and other equipment
Property and Equipment
Land, property and equipment, gross	$ 21,328		$ 13,295
Furniture, fixtures and other equipment \| Minimum
Property and Equipment
Estimated Useful Life	4 years
Furniture, fixtures and other equipment \| Maximum
Property and Equipment
Estimated Useful Life	10 years