Offsetting Assets and Liabilities - Assets (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets	$ 4,181	$ 295
Assets Presented in the Consolidated Balance Sheets	4,181	295
Cash Collateral Received	4,181	295
Credit default swaps
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets		295
Assets Presented in the Consolidated Balance Sheets		295
Cash Collateral Received		$ 295
Interest Rate Swap Agreement
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets	4,181
Assets Presented in the Consolidated Balance Sheets	4,181
Cash Collateral Received	$ 4,181