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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended	12 Months Ended
	Jan. 25, 2020	Mar. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Feb. 20, 2020	Jun. 30, 2019	Jan. 31, 2019
Subsequent events
Cost of shares repurchased			$ 2,486	$ 2,173	$ 5,512
2019 Stock Repurchase Program
Subsequent events
Shares authorized under repurchase program							2,000,000	1,000,000
Number of shares repurchased			1,165,000
Share Price							$ 74.72
Center State Bank Corporation
Subsequent events
Total assets			$ 17,100,000
Loans			12,000,000
Deposits			$ 13,100,000
Common stock shares outstanding			125,174,000
Subsequent event | 2019 Stock Repurchase Program
Subsequent events
Number of shares repurchased		160,000
Share Price		$ 77.63
Cost of shares repurchased		$ 12,400
Additional shares available for repurchase		675,000
Subsequent event | Center State Bank Corporation
Subsequent events
Aggregate consideration	$ 2,900,000
Business Acquisition, Share Price	$ 0.3001
Ownership percentage	47.00%
Share Price						$ 78.16
Subsequent event | Center State Bank Corporation | CenterState Shareholders [Member]
Subsequent events
Ownership percentage	53.00%

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- Definition

The amount of deposit liabilities assumed which have been recognized as of the acquisition date.

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Number of shares of equity interests issued or issuable to acquire entity.

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Percentage of voting equity interests acquired at the acquisition date in the business combination.

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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