v3.24.1.u1
Investment Securities - HTM Debt Securities, Amortized Cost​ (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2024
Dec. 31, 2023
HTM Securities    
Amortized Cost Basis $ 606,592 $ 619,397
Credit Loss Allowance (17,589) (13,143)
Net Carrying Amount 589,003 606,254
Gross Unrealized Holding Gains 86 75
Gross Unrealized Holding Losses (25,126) (25,169)
Fair Value 563,963 581,160
Activity in credit loss allowance for HTM debt securities    
Credit loss allowance at beginning 13,143  
Credit loss provision (reversal), net 4,446  
Credit loss allowance at ending 17,589  
HTM preferred equity interests    
Less than one year 86,051  
One to three years 433,250  
Three to five years 60,588  
Thereafter 9,114  
Total 589,003  
CMBS    
HTM Securities    
Amortized Cost Basis 561,174 580,704
Credit Loss Allowance (182) (164)
Net Carrying Amount 560,992 580,540
Gross Unrealized Holding Gains 56 43
Gross Unrealized Holding Losses (24,145) (24,835)
Fair Value 536,903 555,748
Activity in credit loss allowance for HTM debt securities    
Credit loss allowance at beginning 164  
Credit loss provision (reversal), net 18  
Credit loss allowance at ending 182  
HTM preferred equity interests    
Less than one year 80,084  
One to three years 433,011  
Three to five years 47,897  
Thereafter 0  
Total 560,992  
Preferred interests    
HTM Securities    
Amortized Cost Basis 16,916 9,570
Credit Loss Allowance (7,328) (2,898)
Net Carrying Amount 9,588 6,672
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses (966) (318)
Fair Value 8,622 6,354
Activity in credit loss allowance for HTM debt securities    
Credit loss allowance at beginning 2,898  
Credit loss provision (reversal), net 4,430  
Credit loss allowance at ending 7,328  
HTM preferred equity interests    
Less than one year 5,967  
One to three years 0  
Three to five years 3,621  
Thereafter 0  
Total 9,588  
Infrastructure bonds    
HTM Securities    
Amortized Cost Basis 28,502 29,123
Credit Loss Allowance (10,079) (10,081)
Net Carrying Amount 18,423 19,042
Gross Unrealized Holding Gains 30 32
Gross Unrealized Holding Losses (15) (16)
Fair Value 18,438 $ 19,058
Activity in credit loss allowance for HTM debt securities    
Credit loss allowance at beginning 10,081  
Credit loss provision (reversal), net (2)  
Credit loss allowance at ending 10,079  
HTM preferred equity interests    
Less than one year 0  
One to three years 239  
Three to five years 9,070  
Thereafter 9,114  
Total $ 18,423