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Junior and Other Subordinated Debentures (Tables)
12 Months Ended
Dec. 31, 2024
Debt Disclosure [Abstract]  
Junior and Other Subordinated Debentures
Following is information about the Company's wholly-owned Trusts as of December 31, 2024: 
(dollars in thousands)
Trust NameIssue DateIssued Amount
Carrying Value (1)
Rate (2)
Effective Rate (3)
Maturity Date
AT FAIR VALUE:      
Umpqua Statutory Trust IIOctober 2002$20,619 $19,942 
Floating rate, SOFR + 0.26161% plus 3.35%, adjusted quarterly
8.48 %October 2032
Umpqua Statutory Trust IIIOctober 200230,928 30,030 
Floating rate, SOFR + 0.26161% plus 3.45%, adjusted quarterly
8.48 %November 2032
Umpqua Statutory Trust IVDecember 200310,310 9,638 
Floating rate, SOFR + 0.26161% plus 2.85%, adjusted quarterly
8.31 %January 2034
Umpqua Statutory Trust VDecember 200310,310 9,480 
Floating rate, SOFR + 0.26161% plus 2.85%, adjusted quarterly
8.11 %March 2034
Umpqua Master Trust IAugust 200741,238 32,370 
Floating rate, SOFR + 0.26161% plus 1.35%, adjusted quarterly
7.61 %September 2037
Umpqua Master Trust IBSeptember 200720,619 18,408 
Floating rate, SOFR + 0.26161% plus 2.75%, adjusted quarterly
8.26 %December 2037
Sterling Capital Trust IIIApril 200314,433 13,905 
Floating rate, SOFR + 0.26161% plus 3.25%, adjusted quarterly
8.39 %April 2033
Sterling Capital Trust IVMay 200310,310 9,788 
Floating rate, SOFR + 0.26161% plus 3.15%, adjusted quarterly
8.36 %May 2033
Sterling Capital Statutory Trust VMay 200320,619 19,559 
Floating rate, SOFR + 0.26161% plus 3.25%, adjusted quarterly
8.26 %June 2033
Sterling Capital Trust VIJune 200310,310 9,703 
Floating rate, SOFR + 0.26161% plus 3.20%, adjusted quarterly
8.31 %September 2033
Sterling Capital Trust VIIJune 200656,702 45,972 
Floating rate, SOFR + 0.26161% plus 1.53%, adjusted quarterly
7.58 %June 2036
Sterling Capital Trust VIIISeptember 200651,547 41,928 
Floating rate, SOFR + 0.26161% plus 1.63%, adjusted quarterly
7.68 %December 2036
Sterling Capital Trust IXJuly 200746,392 37,143 
Floating rate, SOFR + 0.26161% plus 1.40%, adjusted quarterly
7.81 %October 2037
Lynnwood Financial Statutory Trust IMarch 20039,279 8,736 
Floating rate, SOFR + 0.26161% plus 3.15%, adjusted quarterly
8.22 %March 2033
Lynnwood Financial Statutory Trust IIJune 200510,310 8,660 
Floating rate, SOFR + 0.26161% plus 1.80%, adjusted quarterly
7.64 %June 2035
Klamath First Capital Trust IJuly 200115,464 15,633 
Floating rate, SOFR + 0.42826% plus 3.75%, adjusted semiannually
9.16 %July 2031
Total junior subordinated debentures, at fair value379,390 330,895    
AT AMORTIZED COST:      
Humboldt Bancorp Statutory Trust IIDecember 200110,310 10,681 
Floating rate, SOFR + 0.26161% plus 3.60%, adjusted quarterly
7.42 %December 2031
Humboldt Bancorp Statutory Trust IIISeptember 200327,836 28,911 
Floating rate, SOFR + 0.26161% plus 2.95%, adjusted quarterly
6.83 %September 2033
CIB Capital TrustNovember 200210,310 10,650 
Floating rate, SOFR + 0.26161% plus 3.45%, adjusted quarterly
7.56 %November 2032
Western Sierra Statutory Trust IJuly 20016,186 6,186 
Floating rate, SOFR + 0.26161% plus 3.58%, adjusted quarterly
8.43 %July 2031
Western Sierra Statutory Trust IIDecember 200110,310 10,310 
Floating rate, SOFR + 0.26161% plus 3.60%, adjusted quarterly
8.21 %December 2031
Western Sierra Statutory Trust IIISeptember 200310,310 10,310 
Floating rate, SOFR + 0.26161% plus 2.90%, adjusted quarterly
7.82 %September 2033
Western Sierra Statutory Trust IVSeptember 200310,310 10,310 
Floating rate, SOFR + 0.26161% plus 2.90%, adjusted quarterly
7.82 %September 2033
Bank of Commerce Holdings Trust IIJuly 200510,310 10,310 
Floating rate, SOFR + 0.26161% plus 1.58%, adjusted quarterly
6.20 %September 2035
Total junior subordinated debentures, at amortized cost95,882 97,668    
Total junior subordinated debentures$475,272 $428,563    
(1)Includes acquisition accounting adjustments, net of accumulated amortization, for junior subordinated debentures assumed in connection with previous mergers as well as fair value adjustments related to trusts recorded at fair value. 
(2)Contractual interest rate of junior subordinated debentures. 
(3)Effective interest rate based upon the carrying value as of December 31, 2024.