Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2017

Goodwill and Other Intangible Assets

Summary of changes in the carrying amounts of goodwill

	Year Ended
	December 31,
(Dollars in thousands)	2017		2016
Balance at beginning of period	$	338,340	$	338,340
Additions:
Goodwill from Southeastern Bank Financial acquisition		258,295		—
Goodwill from Park Sterling Financial merger		402,951		—
Balance at end of period	$	999,586	$	338,340

Summary of gross carrying amounts and accumulated amortization of other intangible assets

	December 31,
(Dollars in thousands)	2017		2016
Gross carrying amount	$	126,449	$	82,154
Accumulated amortization		(52,660)		(42,306)
	$	73,789	$	39,848

Schedule of estimated amortization expense of intangibles assets

(Dollars in thousands)
Year ended December 31:
2018	$	13,614
2019		12,585
2020		11,419
2021		10,186
2022		8,918
Thereafter		17,067
	$	73,789