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Intangible Assets (Changes in Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ (35,958) |  |
Amortization | (14,126) | $ (14,680) | $ (16,366)
Balance, end of period | (135,832) | (35,958) |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (806,988) |  |
Balance, end of period | (1,330,838) | (806,988) |
Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (842,946) | (881,954) | (890,054)
Additions | 637,850 | 0 | 32,680
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | (880) |
Impairment of Intangible Assets (Excluding Goodwill) | 0 | 0 | 24,400
Amortization | (14,126) | (14,680) | (16,366)
Balance, end of period | (1,466,670) | (842,946) | (881,954)
Trademarks |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Amortization | 0 | 0 |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (147,587) | (149,387) | (126,001)
Additions | 55,500 | 0 | 24,200
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 | 0 |
Balance, end of period | (203,087) | (147,587) | (149,387)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | (1,800) |
Amortization | 0 | 0 |
Gaming License Rights |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Amortization | 0 | 0 | 0
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (659,401) | (659,401) | (683,001)
Additions | 468,350 | 0 | 0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 | 0 | 23,600
Balance, end of period | (1,127,751) | (659,401) | (659,401)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | 0 |
Amortization | $ 0 | $ 0 | 0
Customer Relationships |  |  |
Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 7 years 3 months 24 days | 5 years 2 months 13 days |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ (5,930) | $ (19,462) | (26,306)
Additions | 56,000 | 0 | 8,480
Impairments | 0 | 0 | 0
Amortization | (11,643) | (14,452) | (15,324)
Balance, end of period | (50,287) | (5,930) | (19,462)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | 920 |
Amortization | $ (11,643) | $ (14,452) | (15,324)
Favorable Lease Rates |  |  |
Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 37 years | 38 years |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ (8,655) | $ (32,331) | (33,373)
Additions | 0 | 0 | 0
Impairments | 0 | 0 | 0
Amortization | (227) | (228) | (1,042)
Balance, end of period | (8,428) | (8,655) | (32,331)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | 0 |
Amortization | $ (227) | $ (228) | (1,042)
Development Agreement |  |  |
Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 0 years | 0 years |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ (21,373) | $ (21,373) | (21,373)
Additions | 0 | 0 | 0
Impairments | 0 | 0 | 0
Amortization | 0 | 0 | 0
Balance, end of period | (21,373) | (21,373) | (21,373)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | 0 |
Amortization | $ 0 | 0 | 0
Host Relationships [Domain] |  |  |
Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 14 years 4 months 24 days |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ 0 | 0 | 0
Additions | 58,000 | 0 | 0
Impairments | 0 | 0 | 0
Amortization | (2,256) | 0 | 0
Balance, end of period | (55,744) | 0 | 0
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments |  | 0 |
Amortization | (2,256) | 0 | 0
Borgata |  |  |
Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (23,448) |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | (14)
Balance, end of period |  | (23,448) |
Borgata | Gaming License Rights |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | 0
Borgata | Customer Relationships |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | 0 |  |
Balance, end of period |  | 0 |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | 0
Borgata | Favorable Lease Rates |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (23,448) |  |
Balance, end of period |  | (23,448) |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | 0
Borgata | Development Agreement |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | 0 |  |
Balance, end of period |  | 0 |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | 0
Borgata | Host Relationships [Domain] |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | 0 |  |
Balance, end of period |  | 0 |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | 0
Borgata | Trademarks |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | 0 |  |
Balance, end of period |  | 0 |
Borgata | Gaming License Rights |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ 0 |  |
Balance, end of period |  | $ 0 |
Midwest & South | Trademarks |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 800
Midwest & South | Gaming License Rights |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 23,600
Peninsula | Trademarks |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Amortization |  |  | 0
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 800
Intangible Assets [Roll Forward] |  |  |
Amortization |  |  | 0
Peninsula | Borgata | Trademarks |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) |  |  | $ (14)
Maximum | Favorable Lease Rates |  |  |
Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 52 years |  |
Maximum | Host Relationships [Domain] |  |  |
Intangible Assets [Line Items] |  |  |
Finite-Lived Intangible Asset, Useful Life | 15 years |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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