Quarterly Financial Summary (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2018

Quarterly Financial Information Disclosure [Abstract]

Summary of Quarterly Financial Information

The following is a summary of quarterly financial information for the years ended December 31, 2018 and 2017:

	2018 Quarters										2017 Quarters
(In thousands, except per share data)	First			Second		Third		Fourth			First			Second		Third		Fourth
Interest income	$	261,205		284,047		304,962		320,596			$	215,759		231,181		247,688		251,840
Interest expense	36,123			45,877		57,399		66,508			23,179			26,772		31,700		32,741
Net interest income	225,082			238,170		247,563		254,088			192,580			204,409		215,988		219,099
Provision for credit losses	8,346			5,043		11,042		10,401			5,209			8,891		7,896		7,772
Net interest income after provision for credit losses	216,736			233,127		236,521		243,687			187,371			195,518		208,092		211,327
Non-interest income, excluding net securities gains (losses)	86,030			95,221		99,840		77,957			68,820			89,925		79,692		81,024
(Losses) gains on investment securities, net	(351		)	12		90		(2,649		)	(55		)	47		39		14
Non-interest expense	194,349			206,769		213,637		211,333			168,118			183,544		183,575		196,580
Income before taxes	108,066			121,591		122,814		107,662			88,018			101,946		104,248		95,785
Income tax expense	26,085			32,011		30,866		28,005			29,640			37,049		38,622		27,004
Net income	$	81,981		89,580		91,948		79,657			$	58,378		64,897		65,626		68,781
Preferred stock dividends	2,050			2,050		2,050		2,050			3,628			2,050		2,050		2,050
Net income applicable to common shares	$	79,931		87,530		89,898		77,607			$	54,750		62,847		63,576		66,731
Net income per common share:
Basic	$	1.42		$	1.55	$	1.59	$	1.38		$	1.05		$	1.15	$	1.14	$	1.19
Diluted	1.40			1.53		1.57		1.35			1.00			1.11		1.12		1.17
Cash dividends declared per common share	0.19			0.19		0.19		0.19			0.14			0.14		0.14		0.14