The amount of identifiable intangible assets recognized as of the acquisition date.

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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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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.

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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.

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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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Goodwill and Other Intangible Assets - Summary of changes - (Details) - USD ($) $ in Thousands		12 Months Ended
	Apr. 30, 2017	Dec. 31, 2017	Nov. 30, 2017	Jan. 03, 2017	Aug. 21, 2015
Impairment of Goodwill	$ 0	$ 0
Goodwill
Goodwill, Beginning Balance		338,340
Goodwill, Ending Balance		999,586
Bank of America
Goodwill
Core deposit intangible					$ 6,800
Southeastern Bank Financial
Goodwill
Additions, Goodwill from acquisition or merger		258,295
Core deposit intangible				$ 18,120
Park Sterling Corporation
Goodwill
Additions, Goodwill from acquisition or merger		$ 402,951
Core deposit intangible			$ 26,175