XML 58 R48.htm IDEA: XBRL DOCUMENT v3.10.0.1
Fair Value Measurements and Derivative Instruments - Offsetting of Derivative Instruments (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Dec. 31, 2017
Offsetting of Financial Assets under Master Netting Agreements [Abstract]    
Gross Amount of Derivative Assets Presented in the Consolidated Balance Sheet $ 324,483 $ 320,385
Gross Amount of Eligible Offsetting Recognized Derivative Liabilities (90,439) (104,751)
Cash Collateral Received 0 0
Net Amount of Derivative Assets 234,044 215,634
Offsetting of Financial Liabilities under Master Netting Agreements [Abstract]    
Gross Amount of Derivative Liabilities Presented in the Consolidated Balance Sheet (103,349) (115,961)
Gross Amount of Eligible Offsetting Recognized Derivative Assets 90,439 104,751
Cash Collateral Pledged 0 0
Net Amount of Derivative Liabilities $ (12,910) $ (11,210)