XML 81 R48.htm IDEA: XBRL DOCUMENT v3.19.3
Note 7 - Investment Securities - Temporarily Impaired Securities (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Temporarily impaired securities, less than 12 months, fair value $ 194,342 $ 176,667
Temporarily impaired securities, less than 12 months, unrealized losses 341 629
Temporarily impaired securities, 12 months or longer, fair value 498,778 899,523
Temporarily impaired securities, 12 months or longer, unrealized losses 3,649 26,371
Temporarily impaired securities, total fair value 693,120 1,076,190
Temporarily impaired securities, total unrealized losses 3,990 27,000
US Government Corporations and Agencies Securities [Member]    
Temporarily impaired securities, less than 12 months, fair value 49,796 3,388
Temporarily impaired securities, less than 12 months, unrealized losses 108 77
Temporarily impaired securities, 12 months or longer, fair value 3,748 2,483
Temporarily impaired securities, 12 months or longer, unrealized losses 165 118
Temporarily impaired securities, total fair value 53,544 5,871
Temporarily impaired securities, total unrealized losses 273 195
US Treasury Securities [Member]    
Temporarily impaired securities, less than 12 months, fair value   124,751
Temporarily impaired securities, less than 12 months, unrealized losses   50
Temporarily impaired securities, 12 months or longer, fair value   0
Temporarily impaired securities, 12 months or longer, unrealized losses   0
Temporarily impaired securities, total fair value   124,751
Temporarily impaired securities, total unrealized losses   50
US Government-sponsored Enterprises Debt Securities [Member]    
Temporarily impaired securities, less than 12 months, fair value 0 0
Temporarily impaired securities, less than 12 months, unrealized losses 0 0
Temporarily impaired securities, 12 months or longer, fair value 347,699 388,362
Temporarily impaired securities, 12 months or longer, unrealized losses 2,301 11,638
Temporarily impaired securities, total fair value 347,699 388,362
Temporarily impaired securities, total unrealized losses 2,301 11,638
Collateralized Mortgage Backed Securities [Member]    
Temporarily impaired securities, less than 12 months, fair value 115,727 48,528
Temporarily impaired securities, less than 12 months, unrealized losses 220 502
Temporarily impaired securities, 12 months or longer, fair value 146,666 507,701
Temporarily impaired securities, 12 months or longer, unrealized losses 1,165 14,587
Temporarily impaired securities, total fair value 262,393 556,229
Temporarily impaired securities, total unrealized losses 1,385 15,089
Collateralized Mortgage Obligations [Member]    
Temporarily impaired securities, less than 12 months, fair value 0 0
Temporarily impaired securities, less than 12 months, unrealized losses 0 0
Temporarily impaired securities, 12 months or longer, fair value 665 977
Temporarily impaired securities, 12 months or longer, unrealized losses 18 28
Temporarily impaired securities, total fair value 665 977
Temporarily impaired securities, total unrealized losses 18 $ 28
Corporate Debt Securities [Member]    
Temporarily impaired securities, less than 12 months, fair value 28,819  
Temporarily impaired securities, less than 12 months, unrealized losses 13  
Temporarily impaired securities, 12 months or longer, fair value 0  
Temporarily impaired securities, 12 months or longer, unrealized losses 0  
Temporarily impaired securities, total fair value 28,819  
Temporarily impaired securities, total unrealized losses $ 13