Unaudited Quarterly Financial Data

12 Months Ended

Dec. 31, 2019

Quarterly Financial Information Disclosure [Abstract]

Our supplemental consolidated financial information for each three month period in 2019 and 2018 are as follows:



	Three months ended
(Dollars in thousands, except per share amounts)	March 31,			June 30,			September 30,			December 31,
2019:
Interest income	$	551,014		$	585,767		$	583,892		$	588,735
Interest expense	38,128			56,364			63,248			55,067
Net interest income	512,886			529,403			520,644			533,668
Provision for credit losses	28,551			23,946			36,536			17,383
Noninterest income	280,376			333,750			294,009			313,344
Noninterest expense	365,664			383,522			391,324			460,752
Income before income tax expense	399,047			455,685			386,793			368,877
Income tax expense	107,435			119,114			105,075			94,061
Net income before noncontrolling interests	291,612			336,571			281,718			274,816
Net income attributable to noncontrolling interests	(2,880		)	(18,584		)	(14,437		)	(11,960		)
Net income available to common stockholders	$	288,732		$	317,987		$	267,281		$	262,856
Earnings per common share—basic	$	5.49		$	6.12		$	5.19		$	5.10
Earnings per common share—diluted	5.44			6.08			5.15			5.06
2018:
Interest income	$	432,398		$	481,301		$	513,313		$	542,897
Interest expense	12,535			14,858			20,091			28,437
Net interest income	419,863			466,443			493,222			514,460
Provision for credit losses	27,972			29,080			17,174			13,644
Noninterest income	155,518			192,689			210,070			186,707
Noninterest expense	265,417			305,739			309,445			307,592
Income before income tax expense	281,992			324,313			376,673			379,931
Income tax expense	73,966			77,287			95,308			105,000
Net income before noncontrolling interests	208,026			247,026			281,365			274,931
Net income attributable to noncontrolling interests	(13,065		)	(9,228		)	(6,548		)	(8,667		)
Net income available to common stockholders	$	194,961		$	237,798		$	274,817		$	266,264
Earnings per common share—basic	$	3.69		$	4.48		$	5.16		$	5.01
Earnings per common share—diluted	3.63			4.42			5.10			4.96