Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

v3.10.0.1
Fair Value Measurements (Details) - Level 2 - Market Approach - USD ($)
$ in Thousands
Jun. 30, 2018
Mar. 31, 2018
Financial Assets    
Certificates of deposits with maturities greater than 90 days, Carrying Value $ 152 $ 1,022
Certificates of deposits with maturities greater than 90 days, Fair Value 152 1,022
Loans Payable    
Financial Liabilities, Long-term debt    
Long-term debt, Carrying Value 224,375 225,000
Long-term debt, Fair Value 224,375 225,000
Revolving credit facility    
Financial Liabilities, Long-term debt    
Long-term debt, Carrying Value 5,519 0
Long-term debt, Fair Value 5,519 0
Carrying Value | Cross Currency Swap    
Financial Liabilities, Long-term debt    
Derivative Liability (814) 1,540
Fair Value | Cross Currency Swap    
Financial Liabilities, Long-term debt    
Derivative Liability $ (814) $ 1,540