Derivative Financial Instruments Derivative Financial Instruments - Offsetting Derivative Assets and Liabilities (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Offsetting of Derivative Assets
Gross Amounts of Recognized Assets	$ 8,701	$ 2,283
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Net Amounts of Assets presented in the Condensed Consolidated Balance Sheet	8,701	2,283
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	(4,399)	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received	0	0
Net Amount	4,302	2,283
Offsetting of Derivative Liabilities
Gross Amounts of Recognized Liabilities	(4,399)	0
Gross Amounts Offset in the Condensed Consolidated Balance Sheet	0	0
Net Amount	(4,399)	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Financial Instruments	4,399	0
Gross Amounts Not Offset in the Condensed Consolidated Balance Sheet, Cash Collateral Received	0	0
Net Amount	$ 0	$ 0

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