Significant Accounting Policies (Condensed Consolidated Statement of Earnings) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Operating revenue	$ 39,648	$ 39,901	$ 80,270	$ 78,742
Less: Promotional allowances		(2,571)		(5,013)
Net operating revenue	39,648	37,330	80,270	73,729
Gaming	16,435	16,056	34,176	31,702
Hotel	180	154	354	297
Food and beverage	3,924	3,099	7,560	6,065
Changes Related to Adoption of ASU 2014-09 [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2,810		5,469
Less: Promotional allowances	(2,810)		(5,469)
Gaming	308		590
Hotel	(12)		(26)
Food and beverage	(296)		(564)
Revised [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	42,458		85,739
Less: Promotional allowances	(2,810)		(5,469)
Net operating revenue	39,648		80,270
Gaming	16,743		34,766
Hotel	168		328
Food and beverage	3,628		6,996
Gaming [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	32,605	33,412	66,612	65,900
Net operating revenue	32,605	$ 33,412	66,612	$ 65,900
Gaming [Member] \| Changes Related to Adoption of ASU 2014-09 [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	2,810		5,469
Gaming [Member] \| Revised [Member]
Disaggregation of Revenue [Line Items]
Operating revenue	$ 35,415		$ 72,081

This element represents the cost of generating revenues from a hotel's, including cruise lines, gaming operations; likewise, such revenues may be derived from gaming operations that also are hoteliers.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(d))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

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The aggregate cost of goods produced and sold and services rendered during the reporting period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2)
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- Definition

The aggregate costs incurred directly related to operations of owned hotels.

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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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The cost related to generating revenue from the sale of food (prepared and cooked-to-order foodstuffs, as well as snack items) and beverages (bottled or on-tap alcoholic beverages, as well as nonalcoholic beverages like carbonated drinks, juices, energy/sports drinks, water, coffee, and tea).

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1)
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