Annual report pursuant to Section 13 and 15(d)

Stock Compensation (Narrative) (Details)

v3.7.0.1
Stock Compensation (Narrative) (Details) - USD ($)
1 Months Ended 12 Months Ended
May 21, 2015
Mar. 31, 2016
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options outstanding     922,930 721,924 540,404 309,439
Unrecognized compensation expense related to stock options     $ 168,000      
Aggregate intrinsic value of options outstanding     0      
Intrinsic value of all options exercised     0 $ 10,000 $ 40,000  
Net cash proceeds from exercise of stock options     0 0 99,000  
Share based compensation expense before income taxes     632,000 899,000 785,000  
Share based compensation expense after income taxes     411,000 584,000 510,000  
Excess tax benefits from exercise of stock options     $ 0 4,000 $ 14,000  
Shares of ESOP allocated to accounts of eligible employees     595,959      
ESOP contributions   $ 218,758 $ 467,731 $ 395,220    
Issuance of common stock to Employee Stock Ownership Plan, Shares   47,248 60,197 37,640    
2011 Executive Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of additional awards authorized 1,000,000          
Number of awards authorized 2,000,000          
Number of options granted     325,968      
Award expiration period     7 years      
Shares issued under Plan     137,583      
Number of options outstanding     1,026,094      
Awards eligible for grant     836,323      
2011 Executive Incentive Compensation Plan [Member] | Share-based Compensation Award, Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     25.00%      
Stock Option Plan For Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Number of options outstanding     63,000      
1992 Stock Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Awards eligible for grant     10,230      
Employee Stock Ownership Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period     6 years      
Initial award vesting period     2 years      
Requisite service period     1 year      
Employee Stock Ownership Plan [Member] | Share-based Compensation Award, Tranche One [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting percentage     20.00%      
Non-Employee Directors [Member] | Stock Option Plan For Directors [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award expiration period     10 years      
Number of shares automatically granted to each non-employee director     3,000      
Employee Stock Option [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Recognition period for unrecognized compensation expense     2 years 1 month 6 days      
Deferred Stock [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense for awards     $ 171,000      
Recognition period for unrecognized compensation expense     1 year 2 months 12 days      
Deferred Stock [Member] | Key Employees [Member] | 2011 Executive Incentive Compensation Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Deferred stock awards granted     93,828      
Employee Stock Purchase Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percentage of price of common stock at which employees are able to acquire     85.00%      
Awards eligible for grant     76,865      
Restricted Stock Units (RSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Unrecognized compensation expense for awards     $ 33,000      
Recognition period for unrecognized compensation expense     4 months 24 days