Quarterly report pursuant to Section 13 or 15(d)

Derivative Instruments and Hedging Activities - Additional Information (Details)

v3.19.2
Derivative Instruments and Hedging Activities - Additional Information (Details)
$ in Thousands
Jun. 30, 2019
contract
Dec. 31, 2018
contract
Jan. 01, 2018
USD ($)
Not Designated      
Derivative [Line Items]      
Number of instruments held | contract 3 4  
Retained Earnings | Accounting Standards Update 2017-12      
Derivative [Line Items]      
Cumulative impact from the adoption of ASU     $ 432
Accumulated Other Comprehensive Loss | Accounting Standards Update 2017-12      
Derivative [Line Items]      
Cumulative impact from the adoption of ASU     $ (432)