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Subsequent Events (Details) - USD ($)
1 Months Ended 3 Months Ended
May 08, 2019
Apr. 19, 2019
Apr. 30, 2019
Mar. 31, 2019
Subsequent Event [Line Items]        
Cash dividends declared (in dollars per share)       $ 0.22
Subsequent Event        
Subsequent Event [Line Items]        
Cash dividends declared (in dollars per share)   $ 0.22    
Total shares repurchased (in shares)     92,959  
Average price (usd per share)     $ 29.42  
Total cost of repurchased shares     $ 2,700,000  
Subsequent Event | Subordinated Notes, 4.875%, Due May 15, 2029 | Subordinated Debentures        
Subsequent Event [Line Items]        
Debt issued $ 125,000,000      
Fixed interest rate (as a percent) 4.875%      
Percentage of aggregate principal amount 100.00%      
Proceeds from offering $ 122,400,000