Offsetting Assets and Liabilities - Offsetting of Derivative Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Derivatives
Gross Amounts of Recognized Assets		$ 15,089
Gross Amounts Offset in the Consolidated Balance Sheets		0
Net Amounts of Assets presented in the Consolidated Balance Sheets	$ 18,533	15,089
Gross Amounts Not Offset in the Consolidated Balance Sheets, Financial Instruments		(433)
Gross Amounts Not Offset in the Consolidated Balance Sheets, Collateral Received		(14,656)
Net amount		$ 0

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