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Fair Value Measurements - Table of Changes in Level 3 Financial Instruments (Details) - Derivative Financial Instruments Assets and Liabilities [Member]
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]  
Beginning Balance $ 327
Gain included in earnings, net 414
Ending Balance $ 741