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Debt and Leases Debt (Details) - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Debt:          
Long-term Debt     $ 37,784,000 $ 3,750,000  
Unamortized Loan Commitment and Origination Fees and Unamortized Discounts or Premiums     (611,000) 0  
Long-term Line of Credit     17,375,000 0  
Long-term Debt, Gross     59,000,000 6,750,000  
Purchase Price Funded with Debt     49,500,000    
Current portion of long-term debt     (3,230,000) (3,000,000)  
Long-term debt     55,159,000 3,750,000  
Letters of Credit Outstanding, Amount     $ 160,000    
Percent of subsidiary stock not security for financing     65.00%    
Payments to Acquire Property, Plant, and Equipment     $ 5,801,000 4,259,000 $ 2,863,000
Interest Rate Swap Domestic [Member]          
Debt:          
Debt instrument, face amount     25,000,000    
Interest Rate Swap Foreign [Member]          
Debt:          
Debt instrument, face amount     10,000,000    
Term Loan [Member]          
Debt:          
Long-term Debt     $ 41,625,000 $ 0  
Debt Instrument, Interest Rate, Stated Percentage     4.34% 0.00%  
Existing Term Loan [Member]          
Debt:          
Long-term Debt     $ 0 $ 6,750,000  
Debt Instrument, Interest Rate, Stated Percentage     0.00% 2.55%  
Line of Credit [Member]          
Debt:          
Long-term Line of Credit       $ 0  
Interest Rate Swap [Member]          
Debt:          
Debt instrument, face amount     $ 35,000,000    
Derivative, Fixed Interest Rate     2.49%    
Debt Instrument, Description of Variable Rate Basis     30 day LIBOR    
Term Loan Domestic [Member]          
Debt:          
Debt instrument, face amount     $ 32,000,000    
Existing Term Loan [Member]          
Debt:          
Long-term Debt       $ 6,750,000  
Repayment term     5 years    
Debt instrument, face amount     $ 15,500,000    
Debt Instrument, Description of Variable Rate Basis     30 day LIBOR    
Basis spread on variable rate     2.00%    
Term Loan [Member]          
Debt:          
Repayment term     5 years    
Debt instrument, face amount     $ 45,000,000    
Debt Instrument, Description of Variable Rate Basis     30 day LIBOR    
Basis spread on variable rate     2.00%    
Term Loan [Member] | First Amendment [Member]          
Debt:          
Basis spread on variable rate     3.00%    
Domestic Line of Credit [Member]          
Debt:          
Long-term Line of Credit     $ 2,000,000    
Line of Credit [Member]          
Debt:          
Long-term Line of Credit     17,375,000    
Line of Credit Facility, Maximum Borrowing Capacity     $ 40,000,000    
Debt Instrument, Description of Variable Rate Basis     30 day LIBOR    
Basis spread on variable rate     2.00%    
Line of Credit [Member] | First Amendment [Member]          
Debt:          
Line of Credit Facility, Maximum Borrowing Capacity     $ 32,500,000    
Basis spread on variable rate     3.00%    
Foreign Line of Credit [Member]          
Debt:          
Long-term Line of Credit     $ 2,500,000    
Line of Credit Facility, Maximum Borrowing Capacity     10,000,000    
Term Loan Foreign [Member]          
Debt:          
Debt instrument, face amount     13,000,000    
Maximum [Member]          
Debt:          
Letters of Credit Outstanding, Amount     $ 250,000    
Maximum [Member] | Term Loan [Member]          
Debt:          
Basis spread on variable rate     2.00%    
Maximum [Member] | Term Loan [Member] | First Amendment [Member]          
Debt:          
Basis spread on variable rate     4.00%    
Maximum [Member] | Line of Credit [Member]          
Debt:          
Basis spread on variable rate     2.00%    
Maximum [Member] | Line of Credit [Member] | First Amendment [Member]          
Debt:          
Basis spread on variable rate     4.00%    
Minimum [Member] | Term Loan [Member]          
Debt:          
Basis spread on variable rate     2.00%    
Minimum [Member] | Term Loan [Member] | First Amendment [Member]          
Debt:          
Basis spread on variable rate     2.00%    
Minimum [Member] | Line of Credit [Member]          
Debt:          
Basis spread on variable rate     2.00%    
Minimum [Member] | Line of Credit [Member] | First Amendment [Member]          
Debt:          
Basis spread on variable rate     2.00%    
Liability [Member]          
Debt:          
Description of Location of Foreign Currency Derivatives on Balance Sheet     Accrued liabilities other Accrued liabilities other  
Scenario, Forecast [Member] | Maximum [Member] | First Amendment [Member]          
Debt:          
Payments to Acquire Property, Plant, and Equipment $ 7,500,000 $ 12,500,000