Unaudited Quarterly Financial Data (Condensed) (Tables)

12 Months Ended

Dec. 31, 2020

Quarterly Financial Information Disclosure [Abstract]

Summarized unaudited quarterly financial data

Summarized unaudited quarterly financial data is as follows:

	Quarters ended 2020
(Dollars in thousands, except per share data)	March 31		June 30	September 30	December 31
Interest income	$	142,865	155,404	157,487	171,308
Interest expense	8,496		7,185	6,084	5,550
Net interest income	134,369		148,219	151,403	165,758
Provision for credit losses	19,185		16,929	5,186	(1,535)
Net interest income after provision for credit losses	115,184		131,290	146,217	167,293
Non-interest income	33,272		41,224	53,667	44,704
Non-interest expense	95,487		94,764	103,373	111,187
Income before income taxes	52,969		77,750	96,511	100,810
Federal and state income tax expense	9,630		14,306	18,754	18,950
Net income	$	43,339	63,444	77,757	81,860
Basic earnings per share	$	0.46	0.67	0.81	0.86
Diluted earnings per share	$	0.46	0.66	0.81	0.86

	Quarters ended 2019
(Dollars in thousands, except per share data)	March 31		June 30	September 30	December 31
Interest income	$	126,116	132,385	142,395	145,281
Interest expense	10,904		12,089	10,947	8,833
Net interest income	115,212		120,296	131,448	136,448
Provision for credit losses	57		—	—	—
Net interest income after provision for credit losses	115,155		120,296	131,448	136,448
Non-interest income	28,474		30,834	43,049	28,417
Non-interest expense	82,830		86,170	110,675	95,252
Income before income taxes	60,799		64,960	63,822	69,613
Federal and state income tax expense	11,667		12,568	12,212	12,203
Net income	$	49,132	52,392	51,610	57,410
Basic earnings per share	$	0.58	0.61	0.57	0.62
Diluted earnings per share	$	0.58	0.61	0.57	0.62