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, 2016
Dec. 31, 2015
Offsetting Derivative Assets [Abstract]    
Gross amounts of recognized assets $ 588,772 $ 436,169
Gross amounts offset in the condensed consolidated balance sheets 222,765 161,297
Net amounts of assets presented in the condensed consolidated balance sheets 366,007 274,872
Gross amounts not offset in the condensed consolidated balance sheets, Financial instruments (48,950) (39,305)
Gross amounts not offset in the condensed consolidated balance sheets, cash collateral received (3,159) (3,462)
Net amount $ 313,898 $ 232,105