XML 16 R40.htm IDEA: XBRL DOCUMENT v3.19.3
Investment Securities - Narrative (Detail)
$ in Thousands
9 Months Ended
Sep. 30, 2019
USD ($)
Investment
Sep. 30, 2018
USD ($)
Dec. 31, 2018
USD ($)
Investment
Debt Securities, Available-for-sale [Line Items]      
Carrying value of securities pledged to secure public deposits and other contractual obligations $ 363,400   $ 344,200
Pledging requirements for credit derivatives and SWAP agreements - securities $ 14,100   $ 296
Number of investments in non federal issuer representing more than 10% of shareholder's equity | Investment 0   0
Maximum investment in any single non-federal issuer representing shareholders equity 10.00%   10.00%
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss $ (7,728)   $ (14,180)
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year 55    
Proceeds from sales $ 24,987 $ 1,010  
U.S. Government Corporations and Agencies [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss $ (2)   (96)
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year 1    
Corporate Bonds [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss $ (7,250)   (9,099)
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year 13    
Mortgage-Backed Securities [Domain]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss $ (453)    
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year 40    
State and Political Subdivisions [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss     (164)
Collateralized Mortgage Obligations [Member]      
Debt Securities, Available-for-sale [Line Items]      
Available-for-sale securities, continuous unrealized loss position, 12 months or longer, accumulated loss $ (23)   $ (78)
Available-for-sale, securities in unrealized loss positions, qualitative disclosure, number of positions, greater than or equal to one year 1    
Equity Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Proceeds from sales $ 0    
Other Noninterest Income [Member] | Equity Securities [Member]      
Debt Securities, Available-for-sale [Line Items]      
Net realized gain on investment securities $ 12 $ 26