Income Taxes (Details) (USD $)
3 Months Ended 12 Months Ended
Jun. 30, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Current [Abstract]        
Federal   $ 2,842,000 $ 4,256,000 $ 1,216,000
State   385,000 435,000 81,000
Current Total   3,227,000 4,691,000 1,297,000
Deferred [Abstract]        
Federal   3,861,000 (12,664,000) (590,000)
State   1,533,000 (4,231,000) (145,000)
Deferred Total   5,394,000 (16,895,000) (735,000)
Total   8,621,000 (12,204,000) 562,000
Differential income tax provisions computed at the Federal statutory corporate tax rate [Abstract]        
Income (loss) before income tax   23,329,000 22,710,000 (6,911,000)
Tax at Federal statutory rate (35%)   8,165,000 7,949,000 (2,419,000)
Add (deduct) effect of [Abstract]        
State income taxes net of Federal income tax benefit (expense)   1,246,000 (2,467,000) (41,000)
Cash surrender value of life insurance   (376,000) (375,000) (393,000)
Non-deductible ESOP and stock option expense   (62,000) 103,000 119,000
Tax-exempt interest income   (392,000) (185,000) (254,000)
Reversal of federal valuation allowance on deferred taxes   0 (17,008,000) 2,921,000
Intra-period tax allocation between other comprehensive income and loss from operations   0 0 (591,000)
Increase in tax exposure reserve   0 (184,000) 1,216,000
Other   40,000 (37,000) 4,000
Total   8,621,000 (12,204,000) 562,000
Federal statutory rate (in hundredths)   35.00% 35.00% 35.00%
Effective tax rate (in hundredths)   37.00% (53.70%) (8.10%)
Number of prior periods of cumulative losses included in examples of negative evidence      2 years  
Number of most recent periods of cumulative loss used as negative evidence in determining necessity of valuation allowance      3 years   
Federal and state income tax benefit        736,000
Gross deferred tax assets [Abstract]        
Excess book depreciation   46,000 653,000  
Compensation agreements   210,000 277,000  
Restricted stock and stock options   991,000 935,000  
Allowance for loan losses   9,523,000 12,316,000  
Repurchase reserve for loans sold   122,000 357,000  
Real estate owned write-downs   2,401,000 4,005,000  
Interest recognized for tax but not books   1,390,000 1,609,000  
Federal NOL carryforward   467,000 0  
State NOL carryforward   508,000 817,000  
Unrealized loss on impaired securities   598,000 0  
Other   291,000 426,000  
Total gross deferred tax assets   16,547,000 21,395,000  
Gross deferred tax liabilities [Abstract]        
Unrealized gain on securities available for sale, net   0 (1,834,000)  
Mortgage Servicing Rights   (1,365,000) (1,278,000)  
FHLB stock dividends   (736,000) (858,000)  
Deferred loan fees   (622,000) (639,000)  
Deferred liabilities   (2,723,000) (4,609,000)  
Net deferred tax assets   13,824,000 16,786,000  
Operating Loss Carryforwards [Line Items]        
Retained earnings excluding federal or state taxes   16,700,000    
Reconciliation of the beginning and ending amount of unrecognized tax benefits [Roll Forward]        
Balance at January 1   71,000 2,004,000  
Increases related to prior year tax positions   0 13,000  
Increases related to current year tax positions   0 2,000  
Decreases related to prior year tax positions   (71,000) (1,948,000)  
Balance at December 31   0 71,000 2,004,000
Payment towards IRS proposed IRS adjustment 982,000      
Income tax interest or penalties   0 0 241,000
Income tax interest or penalties accrued   0 53,000 241,000
Federal [Member]
       
Operating Loss Carryforwards [Line Items]        
NOL Carryforwards         
Wisconsin [Member]
       
Operating Loss Carryforwards [Line Items]        
NOL Carryforwards   $ 9,900,000    
Operating loss carryforwards expiration date   2028