Quarterly report pursuant to Section 13 or 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Assets (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Assets (Details) - Derivative Contract - USD ($)
$ in Thousands
Jun. 30, 2017
Dec. 31, 2016
Offsetting Derivative Assets [Abstract]    
Gross amounts of recognized assets $ 334,963 $ 420,159
Gross amounts offset in the condensed consolidated balance sheets 144,951 181,940
Net amounts of assets presented in the condensed consolidated balance sheets 190,012 238,219
Gross amounts not offset in the condensed consolidated balance sheets, Financial instruments (5,009) (34,328)
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral received (18,448) (5,428)
Net amount $ 166,555 $ 198,463