Offsetting assets and liabilities - Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets	$ 495	$ 2,814
Amounts presented in the Consolidated Balance Sheets	495	2,814
Cash Collateral Received		2,814
Interest Rate Swap
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets		2,814
Amounts presented in the Consolidated Balance Sheets		2,814
Cash Collateral Received		$ 2,814
Credit default swaps
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets	260
Amounts presented in the Consolidated Balance Sheets	260
FX forwards
Effect of offsetting of the Company’s recognized assets
Gross Amounts of Recognized Assets	235
Amounts presented in the Consolidated Balance Sheets	$ 235