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Intangible Assets (Changes in Intangible Assets) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | $ (73,166) |  |
Amortization | (14,680) | $ (16,366) | $ (26,693)
Balance, end of period | (35,958) | (73,166) |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (808,788) |  |
Balance, end of period | (806,988) | (808,788) |
Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (881,954) | (890,054) | (934,249)
Additions | 0 | 32,680 | 0
Finite-Lived Intangible Assets, Purchase Accounting Adjustments | (880) |  |
Impairment of Intangible Assets (Excluding Goodwill) | 0 | 24,400 | 17,502
Amortization | (14,680) | (16,366) | (26,693)
Balance, end of period | (842,946) | (881,954) | (890,054)
Trademarks |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Amortization | 0 | 0 |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (149,387) | (126,001) | (126,001)
Additions | 0 | 24,200 | 0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 | 800 |
Balance, end of period | (147,587) | (149,387) | (126,001)
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) | (683,001) | (700,503)
Additions | 0 | 0 | 0
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 0 | 23,600 | 17,502
Balance, end of period | (659,401) | (659,401) | (683,001)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments | 0 |  |
Amortization | 0 | 0 | 0
Customer Relationships |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (19,462) | (26,306) | (51,958)
Additions | 0 | 8,480 | 0
Impairments | 0 | 0 | 0
Amortization | (14,452) | (15,324) | (25,652)
Balance, end of period | (5,930) | (19,462) | (26,306)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments | 920 |  |
Amortization | (14,452) | (15,324) | (25,652)
Favorable Lease Rates |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (32,331) | (33,373) | (34,414)
Additions | 0 | 0 | 0
Impairments | 0 | 0 | 0
Amortization | (228) | (1,042) | (1,041)
Balance, end of period | (8,655) | (32,331) | (33,373)
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Purchase Accounting Adjustments | 0 |  |
Amortization | (228) | (1,042) | (1,041)
Development Agreement |  |  |
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
Subsidiaries [Member] |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) | (23,448) |  |
Subsidiaries [Member] | Trademarks |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) | 0 |  |
Subsidiaries [Member] | Gaming License Rights |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) | 0 |  |
Subsidiaries [Member] | Customer Relationships |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) | 0 |  |
Subsidiaries [Member] | Favorable Lease Rates |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) | (23,448) |  |
Subsidiaries [Member] | Development Agreement |  |  |
Intangible Assets [Roll Forward] |  |  |
Finite-Lived Intangible Assets, Period Increase (Decrease) | 0 |  |
Borgata |  |  |
Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (14) |  |
Balance, end of period |  | (14) |
Borgata | Customer Relationships |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | 0 |  |
Balance, end of period |  | 0 |
Borgata | Favorable Lease Rates |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | 0 |  |
Balance, end of period |  | 0 |
Borgata | Development Agreement |  |  |
Finite-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 |
Borgata | Trademarks |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Balance, beginning of period | (14) |  |
Balance, end of period |  | (14) |
Midwest and South | Trademarks |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | 800 |  |
Midwest and South | Gaming License Rights |  |  |
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) | $ 23,600 | $ 17,500 |
Peninsula | Trademarks |  |  |
Finite-lived Intangible Assets [Roll Forward] |  |  |
Amortization |  |  | 0
Indefinite-lived Intangible Assets [Roll Forward] |  |  |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  |  | 0
Intangible Assets [Roll Forward] |  |  |
Amortization |  |  | $ 0

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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://www.xbrl.org/2003/role/presentationRef -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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -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 + Details
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