Goodwill Carrying Amount of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Roll Forward]
Goodwill, beginning balance		$ 339,236	$ 697,400
Impairment	$ (358,200)		(358,200)
Acquisition of business		6,100
Goodwill, ending balance	339,236	345,314	339,236
Applebee's
Goodwill [Roll Forward]
Impairment		(358,200)
Applebee's \| Franchised
Goodwill [Roll Forward]
Goodwill, beginning balance		328,400	686,600
Impairment			(358,200)
Acquisition of business		0
Goodwill, ending balance	328,400	328,400	328,400
Applebee's \| Entity Operated Units
Goodwill [Roll Forward]
Goodwill, beginning balance		0	0
Impairment			0
Acquisition of business		6,100
Goodwill, ending balance	0	6,100	0
IHOP \| Franchised
Goodwill [Roll Forward]
Goodwill, beginning balance		10,800	10,800
Impairment			0
Acquisition of business		0
Goodwill, ending balance	$ 10,800	$ 10,800	$ 10,800

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.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

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- Definition

Amount of loss from the write-down 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

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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