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Summary of Goodwill Activity by Reportable Segment (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016
Goodwill And Intangible Assets [Line Items] |  |
Beginning balance | $ 105,655 | $ 96,288
Goodwill acquired during the year | 52,479 | 8,193
Increase (decrease) in goodwill |  | 1,174
Ending balance | 158,134 | 105,655
Casinos [Member] |  |
Goodwill And Intangible Assets [Line Items] |  |
Beginning balance | 7,796 | 17,080
Goodwill acquired during the year | 52,479 |
Increase (decrease) in goodwill |  | (9,284)
Ending balance | 60,275 | 7,796
Distributed Gaming [Member] |  |
Goodwill And Intangible Assets [Line Items] |  |
Beginning balance | 97,859 | 79,208
Goodwill acquired during the year |  | 8,193
Increase (decrease) in goodwill |  | 10,458
Ending balance | $ 97,859 | $ 97,859

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=84229725&loc=d3e961-128460 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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