XML 152 R101.htm IDEA: XBRL DOCUMENT v2.4.1.9
Stockholders' Equity and Regulatory Capital Reconciliation of stockholders' equity to federal regulatory capital (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Regulatory Capital Requirements [Abstract]        
Stockholders’ equity of the Corporation $ 137,748us-gaap_StockholdersEquity $ 109,275us-gaap_StockholdersEquity $ 99,539us-gaap_StockholdersEquity $ 64,214us-gaap_StockholdersEquity
Unrealized and accumulated (gains) losses on specific items (652)us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax 342us-gaap_AccumulatedOtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax    
Disallowed Servicing Assets and Purchased Credit Card Relationships (94)fbiz_DisallowedServicingAssetsandPurchasedCreditCardRelationships 0fbiz_DisallowedServicingAssetsandPurchasedCreditCardRelationships    
Disallowed Goodwill and Intangibles (10,994)fbiz_DisallowedGoodwillandIntangibles 0fbiz_DisallowedGoodwillandIntangibles    
Trust preferred securities 10,000fbiz_TrustPreferredSecurities 10,000fbiz_TrustPreferredSecurities    
Tier 1 capital 136,008us-gaap_TierOneRiskBasedCapital 119,617us-gaap_TierOneRiskBasedCapital    
Allowable general valuation allowances and subordinated debt 37,255fbiz_AllowableGeneralValuationAllowancesAndSubordinatedDebt 25,735fbiz_AllowableGeneralValuationAllowancesAndSubordinatedDebt    
Risk-based capital $ 173,263us-gaap_Capital $ 145,352us-gaap_Capital