Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Narrative) (Details)

v3.8.0.1
Long-Term Debt (Narrative) (Details)
 12 Months Ended
May 28, 2010
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Line Of Credit Facility And Long Term Debt [Line Items]        
Subordinated debt interest rate 5.00%      
Subordinated Debt     $ 22,610,000  
Revolving Credit Facility [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Line of credit facility, amount outstanding   $ 20,842,000    
Zions First National Bank [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Line of credit facility, amount outstanding   20,842,000    
Credit facility maximum borrowing capacity   $ 40,000,000    
Debt maturity date   Aug. 21, 2022    
Gregory Stockholders [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Accretion of discount   $ 814,000 $ 1,768,000 $ 1,537,000
Subordinated debt interest rate   5.00%    
Subordinated Debt   $ 22,056,000    
Discounted subordinated notes   $ 13,127,000    
Government Entity And Other Financial Institutions [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Interest rate   0.75%    
Third Amendment to Second Amended and Restated Loan Agreement [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Credit facility maximum borrowing capacity   $ 40,000,000    
Credit facility quarterly reductions in borrowing capacity   1,250,000    
Credit facility maximum borrowing capacity after quarterly reductions   20,000,000    
Credit facility temporary increase in borrowing capacity   20,000,000    
Line of Credit Facility, Capacity Available for Specific Purpose Other than for Trade Purchases   $ 30,000,000    
Second Amended and Restated Loan Agreement Opiton 1 [Member] | LIBOR [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Debt Instrument, Imputed Interest Rate   4.00%    
Second Amended and Restated Loan Agreement Opiton 2 [Member] | LIBOR [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Debt Instrument, Imputed Interest Rate   3.00%    
Second Amended and Restated Loan Agreement Opiton 3 [Member] | LIBOR [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Debt Instrument, Imputed Interest Rate   2.00%    
Additional Subordinated Debt [Member] | Gregory Stockholders [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Subordinated Debt   $ 554,000    
Discounted subordinated notes   $ 316,000    
Minimum [Member] | Loan Agreement [Member] | LIBOR [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Debt to EBITDA ratio used in margin calculation   2.00    
Maximum [Member] | Loan Agreement [Member]        
Line Of Credit Facility And Long Term Debt [Line Items]        
Debt to EBITDA ratio used in margin calculation   2.75