CONDENSED BALANCE SHEETS-PARENT COMPANY ONLY (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash	$ 102,241	$ 145,688
Investment in bank subsidiaries	8,713	11,347
Other Assets	123,820	85,357
TOTAL ASSETS	8,591,848	8,529,522
Liabilities and shareholders' equity
Subordinated debt and other borrowings	77,321	144,627
Shareholders' equity	1,131,866	1,161,292
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	8,591,848	8,529,522
Parent Company [Member]
ASSETS
Cash	11,056	1,163
Investment in bank subsidiaries	1,057,054	1,124,076
Investment in other subsidiaries	139,342	179,900
Other Assets	2,142	780
TOTAL ASSETS	1,209,594	1,305,919
Liabilities and shareholders' equity
Subordinated debt and other borrowings	77,321	144,627
Other liabilities	407	0
Shareholders' equity	1,131,866	1,161,292
TOTAL LIABILITIES AND SHAREHOLDER'S EQUITY	1,209,594	1,305,919
Year end cash transferred [Member]
CONDENSED BALANCE SHEETS
Cash transferred to a subsidiary of the Parent Company	$ 115,000	$ 150,000