NON-CONSOLIDATED VARIABLE INTEREST ENTITIES AND SERVICING ASSETS - Statement of financial position (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Assets [Abstract]
Other real estate owned	$ 137,681	$ 146,801
Loans Receivable Net	8,731,276	8,907,541
Other Assets	476,430	476,459
Total assets	11,922,455	12,573,019
Liabilities [Abstract]
Other Liabilities	118,820	159,269
Total liabilities	10,136,212	10,878,885
Stockholders Equity [Abstract]
Stockholders Equity	1,786,243	1,694,134	$ 1,671,743
Total liabilities and stockholders' equity	$ 11,922,455	$ 12,573,019