XML 40 R27.htm IDEA: XBRL DOCUMENT v3.10.0.1
Basis of Accounting and Consolidation Basis of Accounting and Consolidation (Acquisitions) (Details)
 9 Months Ended
Jun. 12, 2018
USD ($)
$ / shares
shares
May 01, 2018
USD ($)
$ / shares
shares
Dec. 11, 2017
$ / shares
shares
Sep. 30, 2018
USD ($)
$ / shares
Sep. 30, 2017
USD ($)
Dec. 31, 2017
USD ($)
$ / shares
Agreement And Plan Of Merger [Abstract]            
Common stock, par value (in dollars per share) | $ / shares       $ 4   $ 4
Assets | $       $ 3,355,477,000   $ 2,841,539,000
Gross loans | $       2,408,043,000   1,946,114,000
Deposits | $       2,651,397,000   $ 2,274,639,000
Aggregate Total Of Cash Paid In Business Combination | $       $ 10,275,000 $ 0  
First BancTrust [Member]            
Agreement And Plan Of Merger [Abstract]            
Percent Of Acquiree Outstanding Stock Being Acquired In Merger     1.00      
Par Value Of Outstanding Stock Being Acquired In Merger | $ / shares     $ 0.01      
Right To Receive Value of Cash Option | $ / shares     $ 5.00      
Right To Receive Value Of Share Option | shares     0.800      
Shares, Issued | shares   1,643,900        
Shares Issued, Price Per Share | $ / shares   $ 37.32        
Aggregate Total Of Cash Paid In Business Combination | $   $ 10,275,000        
SBC Bancorp [Member]            
Agreement And Plan Of Merger [Abstract]            
Percent Of Acquiree Outstanding Stock Being Acquired In Merger 1.00          
Par Value Of Outstanding Stock Being Acquired In Merger | $ / shares $ 7.50          
Right To Receive Value of Cash Option | $ / shares $ 307.93          
Right To Receive Value Of Share Option | shares 8.023          
Dividends, Cash | $ $ 25,000,000