Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Other Assets - Notes Receivable (Details) - USD ($) $ in Thousands	1 Months Ended						6 Months Ended	12 Months Ended
	Apr. 30, 2019	Mar. 31, 2019	Feb. 28, 2019	Nov. 30, 2018	Sep. 30, 2018	Jun. 30, 2018	Jun. 30, 2018	Dec. 31, 2017
Receivables
Notes receivable						$ 4,903	$ 4,903	$ 9,522
Allowance for notes receivable						0	0	0
PCR Note
Receivables
Notes receivable								$ 5,000
Interest rate on loans receivable								10.00%
Pier Park Community Development District notes, non-interest bearing, due September 2022
Receivables
Notes receivable						1,316	1,316	$ 1,527
Interest bearing homebuilder note - 5.5% interest rate, due February 2020
Receivables
Notes receivable						1,204	$ 1,204
Interest rate							5.50%
Interest bearing homebuilder note - 5.5% interest rate, due February 2020 \| Forecast
Receivables
Proceeds of principal payment			$ 100
Interest bearing homebuilder note - 5.5% interest rate, due September 2019
Receivables
Notes receivable						904	$ 904	904
Interest rate							5.50%
Interest bearing homebuilder note - 5.5% interest rate, due September 2019 \| Forecast
Receivables
Proceeds of principal payment					$ 100
Interest bearing homebuilder note - 5.5% interest rate, due June 2019
Receivables
Notes receivable						666	$ 666	857
Interest rate							5.50%
Proceeds of principal payment						100
Interest bearing homebuilder note - 5.5% interest rate, due November 2019
Receivables
Notes receivable						392	$ 392	1,060
Interest rate							5.50%
Interest bearing homebuilder note - 5.5% interest rate, due November 2019 \| Forecast
Receivables
Proceeds of principal payment				$ 100
Interest bearing homebuilder note - 6.3% interest rate, due March 2020
Receivables
Notes receivable						200	$ 200
Interest rate							6.30%
Interest bearing homebuilder note - 6.3% interest rate, due March 2020 \| Forecast
Receivables
Proceeds of principal payment		$ 100
Various mortgage notes, secured by certain real estate, bearing interest at various rates
Receivables
Notes receivable						153	$ 153	$ 174
Interest bearing homebuilder note - 6.3% interest rate, due April 2020
Receivables
Notes receivable						$ 68	$ 68
Interest rate							6.30%
Interest bearing homebuilder note - 6.3% interest rate, due April 2020 \| Forecast
Receivables
Proceeds of principal payment	$ 100