Fair Value Measurements and Derivatives - Amounts Recognized within Assets and Liabilities Based on Right of Offset (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Gross Amounts, Assets	$ 4,235	$ 277
Total Net Amounts, Assets	4,235	277
Gross Amounts Not Offset, Assets	(4,235)
Net Amounts, Assets		277
Gross Amounts, Liabilities	363,043	192,034
Gross Amounts Offset, Liabilities		(3,152)
Total Net Amounts, Liabilities	363,043	188,882
Gross Amounts Not Offset, Liabilities	$ (363,043)	(149,863)
Net Amounts, Liabilities		$ 39,019