Goodwill and Other Intangible Assets (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Goodwill and other intangibles assets    
Goodwill impairment $ 0 $ 0
Changes in the carrying amount of goodwill 0 0
Total Goodwill 20,686 20,686
FirsTech    
Goodwill and other intangibles assets    
Total Goodwill 8,992 8,992
Busey Wealth Management    
Goodwill and other intangibles assets    
Total Goodwill $ 11,694 $ 11,694