Business Combinations - Fair Value of the Assets Purchased, Including Goodwill, and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Oct. 19, 2018	Dec. 31, 2017	Nov. 03, 2017	Oct. 20, 2017	Apr. 07, 2017	Dec. 31, 2016	Dec. 31, 2015
Assets:
Goodwill	$ 204,753		$ 147,578				$ 64,649	$ 25,211
Gulf Shore Banc shares Inc
Assets:
Cash						$ 38,267
Time deposits with other banks						17,273
Investment securities						316
Loans, net						250,876
Fixed assets						1,307
Other real estate owned						13
Core deposit intangibles						3,927
Goodwill						37,098
Other assets						8,572
Total assets						357,649
Liabilities:
Deposits						285,350
Other liabilities						1,382
Total liabilities						$ 286,732
NorthStar Bank | Measurement Period Adjustments
Assets:
Cash					$ 0
Investment securities					0
Loans, net					0
Fixed assets					0
Core deposit intangibles					0
Goodwill					(99)
Other assets					99
Total assets					0
Liabilities:
Deposits					0
Other liabilities					0
Total liabilities					0
NorthStar Bank | Initially Reported
Assets:
Cash					5,485
Investment securities					56,123
Loans, net					136,832
Fixed assets					2,637
Core deposit intangibles					1,275
Goodwill					12,404
Other assets					1,522
Total assets					216,278
Liabilities:
Deposits					182,443
Other liabilities					980
Total liabilities					183,423
NorthStar Bank | As Adjusted
Assets:
Cash					5,485
Investment securities					56,123
Loans, net					136,832
Fixed assets					2,637
Core deposit intangibles					1,275
Goodwill					12,305
Other assets					1,621
Total assets					216,278
Liabilities:
Deposits					182,443
Other liabilities					980
Total liabilities					$ 183,423
Palm Beach Community Bank | Measurement Period Adjustments
Assets:
Cash				$ 0
Investment securities				0
Loans, net				(1,772)
Fixed assets				0
Core deposit intangibles				0
Goodwill				1,076
Other assets				696
Total assets				0
Liabilities:
Deposits				0
Other liabilities				0
Total liabilities				0
Palm Beach Community Bank | Initially Reported
Assets:
Cash				9,301
Investment securities				22,098
Loans, net				272,090
Fixed assets				7,641
Core deposit intangibles				2,523
Goodwill				33,428
Other assets				9,909
Total assets				356,990
Liabilities:
Deposits				268,633
Other liabilities				16,351
Total liabilities				284,984
Palm Beach Community Bank | As Adjusted
Assets:
Cash				9,301
Investment securities				22,098
Loans, net				270,318
Fixed assets				7,641
Core deposit intangibles				2,523
Goodwill				34,504
Other assets				10,605
Total assets				356,990
Liabilities:
Deposits				268,633
Other liabilities				16,351
Total liabilities				$ 284,984
First Green Bancorp, Inc.
Assets:
Cash		$ 29,434
Investment securities		32,145
Loans, net		631,497
Fixed assets		16,828
Other real estate owned		410
Core deposit intangibles		10,170
Goodwill		56,198
Other assets		40,669
Total assets		817,351
Liabilities:
Deposits		624,289
Other liabilities		79,018
Total liabilities		$ 703,307