Business Combinations - Pro-forma Information (Details) - USD ($) $ in Thousands		3 Months Ended
	Mar. 29, 2019	Mar. 31, 2019
Pro-forma information
Bargain purchase gain		$ 30,728
Owens Realty Mortgage, Inc.
Pro-forma information
Interest income		51,543
Interest expense		(36,323)
Provision for loan losses		(518)
Noninterest income		27,031
Noninterest expense		(37,721)
Income before provision for income taxes		4,012
Income tax benefit (provision)		2,996
Net income		7,008
Nonrecurring transaction costs excluded from pro forma non-interest expense		8,400
Bargain purchase gain	$ 30,728	30,700
Knight Capital
Pro-forma information
Interest income		48,753
Interest expense		(35,775)
Provision for loan losses		(518)
Noninterest income		71,925
Noninterest expense		(57,600)
Income before provision for income taxes		26,785
Income tax benefit (provision)		3,003
Net income		$ 29,788