Quarterly report pursuant to Section 13 or 15(d)

Debt and Interest Rate Swap (Details)

v3.20.1
Debt and Interest Rate Swap (Details) - USD ($)
$ in Thousands
3 Months Ended 29 Months Ended 35 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Mar. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Nov. 03, 2017
May 12, 2017
Debt Instrument [Line Items]                
Debt Instrument, Unamortized Discount               $ (2,100)
Long-term debt $ 207,197   $ 207,197 $ 207,197 $ 206,909      
Line of Credit Facility, Incremental Borrowing Capacity $ 160,000   $ 160,000 $ 160,000        
Debt Instrument, Frequency of Periodic Payment quarterly installments              
Debt Instrument, Quarterly Amortization Rate 0.25%   0.25% 0.25%        
Debt Instrument, Call Feature 1.0% soft call premium              
Repayments of Debt       $ 213,000        
Document Period End Date Mar. 31, 2020              
Debt Instrument, Interest Rate, Effective Percentage 4.60%   4.60% 4.60% 4.90%     4.60%
Long-term Debt, Fair Value $ 200,800   $ 200,800 $ 200,800 $ 214,600     $ 398,500
Debt Issuance Costs, Gross               6,000
Amortization of debt issuance costs and accretion of discount on debt and leases 300 $ 300            
Debt Instrument, Annual Principal Payment $ 212,000   $ 212,000 $ 212,000 212,000      
Derivative, Fixed Interest Rate 4.25%   4.25% 4.25%     1.74685%  
Derivative Asset   1,005       $ 1,623    
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss) $ (194) (618)            
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax $ (153) $ (488) $ (200)          
Base Rate [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Interest Rate Terms a base rate              
Debt Instrument, Basis Spread on Variable Rate 1.50%              
Fed Funds Effective Rate Overnight Index Swap Rate [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Interest Rate Terms the federal funds rate, plus 0.50%              
Prime Rate [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Interest Rate Terms prime rate              
One, Two, Or Three Month London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Interest Rate Terms an adjusted LIBOR rate determined on the basis of a one- three- or six-month interest period, plus 1.0%              
London Interbank Offered Rate (LIBOR) Subject to Floor [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Interest Rate Terms adjusted LIBOR rate, subject to a floor of 0.75%              
Debt Instrument, Basis Spread on Variable Rate 2.50%              
London Interbank Offered Rate (LIBOR) [Member]                
Debt Instrument [Line Items]                
Debt Instrument, Basis Spread on Variable Rate 2.50%              
Medium-term Notes [Member]                
Debt Instrument [Line Items]                
Long-term Debt, Gross $ 212,000   212,000 $ 212,000 212,000     $ 425,000
Debt Instrument, Unamortized Discount (1,253)   (1,253) (1,253) (1,328)      
Debt Issuance Costs, Net (3,550)   (3,550) (3,550) (3,763)      
Long-term Debt 207,197   207,197 207,197 206,909      
Long-term Debt, Current Maturities 0   0 0 0      
Long-term debt 207,197   207,197 207,197 206,909      
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member] | Derivative Financial Instruments, Assets [Member]                
Debt Instrument [Line Items]                
Derivative Asset $ 200   $ 200 $ 200 $ 40