Quarterly Financial Data (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Schedule of Quarterly Financial Information

Summarized unaudited quarterly financial data follows for the three months ended:

	2019 Quarter Ended,
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Interest income	$	173,130	$	173,466	$	172,417	$	165,773
Interest expense	53,522		56,245		56,159		52,265
Net interest income before provision for loan losses	119,608		117,221		116,258		113,508
Provision for loan losses	3,000		1,200		2,100		1,000
Net interest income after provision for loan losses	116,608		116,021		114,158		112,508
Noninterest income	11,422		12,287		12,995		12,979
Noninterest expense	70,833		71,371		69,995		70,429
Income before income tax provision	57,197		56,937		57,158		55,058
Income tax provision	14,439		14,256		14,566		12,049
Net income	$	42,758	$	42,681	$	42,592	$	43,009
Basic earnings per common share	$	0.34	$	0.34	$	0.34	$	0.34
Diluted earnings per common share	$	0.34	$	0.34	$	0.34	$	0.34

	2018 Quarter Ended,
	March 31		June 30		September 30		December 31
	(Dollars in thousands, except per share data)
Interest income	$	150,410	$	159,910	$	167,826	$	172,026
Interest expense	30,342		37,091		44,679		50,133
Net interest income before provision for loan losses	120,068		122,819		123,147		121,893
Provision for loan losses	2,500		2,300		7,300		2,800
Net interest income after provision for loan losses	117,568		120,519		115,847		119,093
Noninterest income	19,850		15,269		13,447		11,614
Noninterest expense	68,453		71,629		67,455		70,189
Income before income tax provision	68,965		64,159		61,839		60,518
Income tax provision	17,733		16,629		15,461		16,069
Net income	$	51,232	$	47,530	$	46,378	$	44,449
Basic earnings per common share	$	0.38	$	0.36	$	0.36	$	0.35
Diluted earnings per common share	$	0.38	$	0.36	$	0.36	$	0.35