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Credit Facilities (Tables)
3 Months Ended
Mar. 31, 2018
Line of Credit Facility [Line Items]  
Schedule of Maturities of Long-term Debt
At March 31, 2018, the aggregate future maturities of long-term debt by year are as follows (in thousands):
2018
$

2019
75,000

2020

2021

2022

Total
$
75,000