Unaudited Quarterly Financial Data (Condensed) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Summarized unaudited quarterly financial data

Summarized unaudited quarterly financial data is as follows:

	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 loan losses	57		—	—	—
Net interest income after provision for loan 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

	Quarters ended 2018
(Dollars in thousands, except per share data)	March 31		June 30	September 30	December 31
Interest income	$	103,066	117,715	122,905	125,310
Interest expense	7,774		9,161	9,160	9,436
Net interest income	95,292		108,554	113,745	115,874
Provision for loan losses	795		4,718	3,194	1,246
Net interest income after provision for loan losses	94,497		103,836	110,551	114,628
Non-interest income	26,086		31,828	32,416	28,494
Non-interest expense	73,627		81,795	82,829	81,876
Income before income taxes	46,956		53,869	60,138	61,246
Federal and state income tax expense	8,397		9,485	10,802	11,647
Net income	$	38,559	44,384	49,336	49,599
Basic earnings per share	$	0.48	0.53	0.58	0.59
Diluted earnings per share	$	0.48	0.52	0.58	0.59