XML 60 R45.htm IDEA: XBRL DOCUMENT v3.19.1
Financial Instruments - Derivatives and Hedging (Fair Value) (Details) - Interest Rate Swap - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Derivatives, Fair Value [Line Items]    
Gross derivative assets $ 12,788 $ 18,630
Gross derivative liabilities (6,786) (2,571)
Net derivative assets $ 6,002 $ 16,059