XML 12 R41.htm IDEA: XBRL DOCUMENT v3.20.1
Securities - Amortized Cost, Estimated Fair Value and Credit Rating of Corporate Debt Securities (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 920,687 $ 772,975
Estimated Fair Value 928,582 $ 777,290
Chase Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost 10,000  
Estimated Fair Value $ 8,300  
Credit Rating Moody’s/ S&P Baa1/BBB-  
Wells Fargo Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 5,000  
Estimated Fair Value $ 4,200  
Credit Rating Moody’s/ S&P A1/BBB  
Huntington Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 5,000  
Estimated Fair Value $ 3,850  
Credit Rating Moody’s/ S&P Baa2/BB+  
Keycorp Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 5,000  
Estimated Fair Value $ 4,100  
Credit Rating Moody’s/ S&P Baa2/BB+  
PNC Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 5,000  
Estimated Fair Value $ 4,010  
Credit Rating Moody’s/ S&P Baa1/BBB-  
State Street Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 3,332  
Estimated Fair Value $ 2,732  
Credit Rating Moody’s/ S&P A3/BBB  
SunTrust Capital    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 5,000  
Estimated Fair Value $ 4,100  
Credit Rating Moody’s/ S&P Not Rated/BBB-  
Corporate debt securities    
Schedule of Held-to-maturity Securities [Line Items]    
Amortized Cost $ 38,332  
Estimated Fair Value $ 31,292