FINANCIAL INSTRUMENT COMMITMENTS (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
OTHER REAL ESTATE OWNED (Details)
Commitments to extend credit	$ 1,903,000	$ 4,670,000
Outstanding letters of credit	$ 45,000	$ 317,000

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

Name:	us-gaap_OtherCommitment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant