FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 2) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Assets:
Securities available-for-sale	$ 350,341	$ 412,293
Total securities	573,312	533,520
Corporate loans, estimated fair value	237,480	35,879
Equity investments, at estimated fair value	181,212	161,621
Derivatives:
Total derivatives	30,224	23,207
Derivatives:
Total derivatives	81,635	117,270
Residential mortgage-backed securities
Assets:
Trading securities	76,004	83,842
Significant Other Observable Inputs (Level 2)
Derivatives:
Other assets	5,513	16,439
Significant Unobservable Inputs (Level 3)
Derivatives:
Other assets		338
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets:
Equity investments, at estimated fair value	39,515	23,790
Interests in joint ventures and partnerships	14,836
Derivatives:
Total derivatives		1,744
Total	54,351	25,534
Liabilities:
Securities sold, not yet purchased		1,158
Derivatives:
Total		1,158
Recurring basis | Quoted Prices in Active Markets for Identical Assets (Level 1) | Common stock warrants
Derivatives:
Derivative assets		1,744
Recurring basis | Significant Other Observable Inputs (Level 2)
Assets:
Securities available-for-sale	326,940	370,072
Total securities	366,377	404,548
Equity investments, at estimated fair value	3,638	40,085
Derivatives:
Total derivatives	14,489	11,327
Other assets		319
Total	469,184	476,017
Derivatives:
Total derivatives	81,635	116,985
Total	81,635	116,985
Recurring basis | Significant Other Observable Inputs (Level 2) | Other securities, at estimated fair value
Assets:
Trading securities	39,437	34,476
Recurring basis | Significant Other Observable Inputs (Level 2) | Interest rate swaps
Derivatives:
Derivative assets	3,290
Derivatives:
Derivative liabilities	45,368	90,618
Recurring basis | Significant Other Observable Inputs (Level 2) | Commodity swaps
Derivatives:
Derivative assets	5,408	8,557
Derivatives:
Derivative liabilities	3,915	1,501
Recurring basis | Significant Other Observable Inputs (Level 2) | Credit default swaps-protection sold
Derivatives:
Derivative assets		19
Recurring basis | Significant Other Observable Inputs (Level 2) | Credit default swaps-protection purchased
Derivatives:
Derivative assets		136
Derivatives:
Derivative liabilities	2,019	1,276
Recurring basis | Significant Other Observable Inputs (Level 2) | Foreign exchange forward contracts
Derivatives:
Derivative assets	4,846	2,615
Derivatives:
Derivative liabilities	30,104	23,590
Recurring basis | Significant Other Observable Inputs (Level 2) | Common stock warrants
Derivatives:
Derivative assets	945
Recurring basis | Significant Other Observable Inputs (Level 2) | Total Rate of Return Swaps
Derivatives:
Derivative liabilities	229
Recurring basis | Significant Other Observable Inputs (Level 2) | Portion at estimated fair value
Assets:
Corporate loans, estimated fair value	84,680	19,738
Recurring basis | Significant Unobservable Inputs (Level 3)
Assets:
Securities available-for-sale	23,401	42,221
Total securities	206,935	128,972
Equity investments, at estimated fair value	138,059	97,746
Interests in joint ventures and partnerships	415,247	142,477
Derivatives:
Total derivatives	15,735	10,136
Total	928,776	395,472
Derivatives:
Total derivatives		285
Total		285
Recurring basis | Significant Unobservable Inputs (Level 3) | Other securities, at estimated fair value
Assets:
Trading securities	107,530	2,909
Recurring basis | Significant Unobservable Inputs (Level 3) | Residential mortgage-backed securities
Assets:
Trading securities	76,004	83,842
Recurring basis | Significant Unobservable Inputs (Level 3) | Foreign exchange options
Derivatives:
Derivative assets	8,941	8,562
Derivatives:
Derivative liabilities		285
Recurring basis | Significant Unobservable Inputs (Level 3) | Common stock warrants
Derivatives:
Derivative assets		1,574
Recurring basis | Significant Unobservable Inputs (Level 3) | Options
Derivatives:
Derivative assets	6,794
Recurring basis | Significant Unobservable Inputs (Level 3) | Portion at estimated fair value
Assets:
Corporate loans, estimated fair value	152,800	16,141
Recurring basis | Estimated Fair Value
Assets:
Securities available-for-sale	350,341	412,293
Total securities	573,312	533,520
Corporate loans, estimated fair value	237,480	35,879
Equity investments, at estimated fair value	181,212	161,621
Interests in joint ventures and partnerships	430,083	142,477
Derivatives:
Total derivatives	30,224	23,207
Other assets		319
Total	1,452,311	897,023
Liabilities:
Securities sold, not yet purchased		1,158
Derivatives:
Total derivatives	81,635	117,270
Total	81,635	118,428
Recurring basis | Estimated Fair Value | Other securities, at estimated fair value
Assets:
Trading securities	146,967	37,385
Recurring basis | Estimated Fair Value | Residential mortgage-backed securities
Assets:
Trading securities	76,004	83,842
Recurring basis | Estimated Fair Value | Interest rate swaps
Derivatives:
Derivative assets	3,290
Derivatives:
Derivative liabilities	45,368	90,618
Recurring basis | Estimated Fair Value | Commodity swaps
Derivatives:
Derivative assets	5,408	8,557
Derivatives:
Derivative liabilities	3,915	1,501
Recurring basis | Estimated Fair Value | Credit default swaps-protection sold
Derivatives:
Derivative assets		19
Recurring basis | Estimated Fair Value | Credit default swaps-protection purchased
Derivatives:
Derivative assets		136
Derivatives:
Derivative liabilities	2,019	1,276
Recurring basis | Estimated Fair Value | Foreign exchange forward contracts
Derivatives:
Derivative assets	4,846	2,615
Derivatives:
Derivative liabilities	30,104	23,590
Recurring basis | Estimated Fair Value | Foreign exchange options
Derivatives:
Derivative assets	8,941	8,562
Derivatives:
Derivative liabilities		285
Recurring basis | Estimated Fair Value | Common stock warrants
Derivatives:
Derivative assets	945	3,318
Recurring basis | Estimated Fair Value | Total Rate of Return Swaps
Derivatives:
Derivative liabilities	229
Recurring basis | Estimated Fair Value | Options
Derivatives:
Derivative assets	$ 6,794