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Securities (Tables)

9 Months Ended

Sep. 30, 2020

Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]

Amortized Cost and Fair Value of Debt Securities Available for Sale

		September 30, 2020																December 31, 2019
						Gross				Gross								Gross				Gross
Securities Available for Sale		Amortized				Unrealized				Unrealized				Fair				Amortized				Unrealized				Unrealized				Fair
(in thousands)		Cost				Gains				Losses				Value				Cost				Gains				Losses				Value
U.S. Treasury and government agency securities		$	192,077			$	6,664			$	125			$	198,616			$	98,320			$	652			$	300			$	98,672
Municipal obligations			297,712				16,291				347				313,656				242,016				7,789				—				249,805
Residential mortgage-backed securities			2,536,999				70,222				531				2,606,690				1,910,909				20,268				7,020				1,924,157
Commercial mortgage-backed securities			1,965,664				136,056				720				2,101,000				1,570,765				19,880				4,178				1,586,467
Collateralized mortgage obligations			410,050				9,141				21				419,170				807,600				3,757				3,142				808,215
Corporate debt securities			8,000				185				2				8,183				8,000				21				33				7,988
		$	5,410,502			$	238,559			$	1,746			$	5,647,315			$	4,637,610			$	52,367			$	14,673			$	4,675,304

Amortized Cost and Fair Value of Debt Securities Held to Maturity

		September 30, 2020																December 31, 2019
						Gross				Gross								Gross				Gross
Securities Held to Maturity		Amortized				Unrealized				Unrealized				Fair				Amortized				Unrealized				Unrealized				Fair
(in thousands)		Cost				Gains				Losses				Value				Cost				Gains				Losses				Value
U.S. Treasury and government agency securities		$	—			$	—			$	—			$	—			$	50,000			$	3			$	—			$	50,003
Municipal obligations			630,894				49,348				17				680,225				641,019				27,146				69				668,096
Residential mortgage-backed securities			24,041				1,641				—				25,682				29,687				883				—				30,570
Commercial mortgage-backed securities			550,201				53,253				—				603,454				539,371				12,474				581				551,264
Collateralized mortgage obligations			203,825				4,502				—				208,327				307,932				3,597				458				311,071
		$	1,408,961			$	108,744			$	17			$	1,517,688			$	1,568,009			$	44,103			$	1,108			$	1,611,004

Proceeds from Gross Gains on and Gross Losses on Sale of Securities

The following table presents the proceeds from, gross gain on, and gross losses on sales of securities during the nine months ended September 30, 2020 and 2019.

		Nine Months Ended September 30,
(in thousands)		2020				2019
Proceeds		$	211,919			$	143,304
Gross gains			1,984				—
Gross losses			1,496				—

Available for Sale Securities [Member]

Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]

Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

Debt Securities Available for Sale		Amortized				Fair
(in thousands)		Cost				Value
Due in one year or less		$	14,492			$	14,540
Due after one year through five years			239,148				258,655
Due after five years through ten years			2,066,697				2,196,332
Due after ten years			3,090,165				3,177,788
Total available for sale debt securities		$	5,410,502			$	5,647,315

Securities with Unrealized Losses

Available for Sale
September 30, 2020		Losses < 12 months								Losses 12 months or >								Total
(in thousands)		Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses				Fair Value				Gross Unrealized Losses
U.S. Treasury and government agency securities		$	44,039			$	125			$	—			$	—			$	44,039			$	125
Municipal obligations			26,010				347				—				—				26,010				347
Residential mortgage-backed securities			229,662				529				367				2				230,029				531
Commercial mortgage-backed securities			252,858				720				—				—				252,858				720
Collateralized mortgage obligations			3,300				21				—				—				3,300				21
Corporate debt securities			3,498				2				—				—				3,498				2
		$	559,367			$	1,744			$	367			$	2			$	559,734			$	1,746

Available for Sale
December 31, 2019		Losses < 12 months								Losses 12 months or >								Total
						Gross								Gross									Gross
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
(in thousands)		Value				Losses				Value				Losses				Value				Losses
U.S. Treasury and government agency securities		$	28,235				300			$	—			$	—			$	28,235			$	300
Municipal obligations			—				—				—				—				—				—
Residential mortgage-backed securities			420,066				5,042				399,787				1,978				819,853				7,020
Commercial mortgage-backed securities			458,855				3,971				14,896				207				473,751				4,178
Collateralized mortgage obligations			89,689				1,315				184,389				1,827				274,078				3,142
Corporate debt securities			1,467				33				—				—				1,467				33
		$	998,312			$	10,661			$	599,072			$	4,012			$	1,597,384			$	14,673

Held-to-maturity Securities [Member]

Schedule Of Gain Loss On Investments Including Marketable Securities And Investments Held At Cost Income Statement Reported Amounts Summary [Line Items]

Amortized Cost and Fair Value of Debt Securities by Contractual Maturity

Debt Securities Held to Maturity		Amortized				Fair
(in thousands)		Cost				Value
Due in one year or less		$	2,196			$	2,191
Due after one year through five years			189,141				201,869
Due after five years through ten years			636,976				701,345
Due after ten years			580,648				612,283
Total held to maturity securities		$	1,408,961			$	1,517,688

Securities with Unrealized Losses

Held to Maturity
September 30, 2020		Losses < 12 months								Losses 12 months or >								Total
						Gross								Gross								Gross
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
(in thousands)		Value				Losses				Value				Losses				Value				Losses
U.S. Treasury and government agency securities		$	—			$	—			$	—			$	—			$	—			$	—
Municipal obligations			523				2				2,890				15				3,413				17
Residential mortgage-backed securities			—				—				—				—				—				—
Commercial mortgage-backed securities			222				—				—				—				222				—
Collateralized mortgage obligations			—				—				—				—				—				—
		$	745			$	2			$	2,890			$	15			$	3,635			$	17

Held to Maturity
December 31, 2019		Losses < 12 months								Losses 12 months or >								Total
						Gross				Gross													Gross
		Fair				Unrealized				Fair				Unrealized				Fair				Unrealized
(in thousands)		Value				Losses				Value				Losses				Value				Losses
U.S. Treasury and government agency securities		$	—			$	—			$	—			$	—			$	—			$	—
Municipal obligations			4,735				38				3,143				31				7,878				69
Residential mortgage-backed securities			—				—				—				—				—				—
Commercial mortgage-backed securities			28,426				581				—				—				28,426				581
Collateralized mortgage obligations			—				—				49,110				458				49,110				458
		$	33,161			$	619			$	52,253			$	489			$	85,414			$	1,108

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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
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-Paragraph 5B
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