CONDENSED STATEMENTS OF CASH FLOWS-PARENT COMPANY ONLY (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Cash flows from operating activities
Net income	$ 53,387	$ 98,910	$ 87,544
Decrease (increase) in other assets	(13,740)	13,096	12,952
Decrease in other liabilities	29,424	29,857	8,775
Net cash provided by operating activities	162,057	167,108	141,201
Cash flows from investing activities
Net cash (used in) provided by investing activities	(278,472)	(97,745)	96,678
Cash flows from financing activities
Treasury Stock Purchased (in $)		(67,531)
Payment to repurchase preferred stock	0	0	(150,000)
Common stock warrant repurchase	0	0	(1,000)
Net cash used in financing activities	(28,190)	(92,757)	(488,739)
Net decrease in cash and cash equivalents	(144,605)	(23,394)	(250,860)
Cash and cash equivalents at beginning of year	428,128	451,522	702,382
Cash and cash equivalents at end of year	283,523	428,128	451,522
Parent Company [Member]
Cash flows from operating activities
Net income	53,387	98,910	87,544
Equity in undistributed net loss earnings of subsidiaries	24,961	110,930	(88,604)
Decrease (increase) in other assets	(1,185)	4,843	(4,444)
Decrease in other liabilities	407	(1,835)	(2,361)
Other, net	(2,100)	0	0
Net cash provided by operating activities	75,470	212,848	(7,865)
Cash flows from investing activities
Capital contributions to subsidiaries	(115,000)	(150,000)	(58,039)
Capital received from subsidiaries	151,956	55,997	4,844
Net cash (used in) provided by investing activities	36,956	(94,003)	(53,195)
Cash flows from financing activities
Proceeds from advances from subsidiaries	0	1,063	2,530
Repayment of advances from subsidiaries	(65,206)	(1,746)	0
Common and treasury stock issuances	6,370	7,092	91,740
Treasury Stock Purchased (in $)	0	(67,531)	0
Payment to repurchase preferred stock	0	0	(150,000)
Cash dividends	(43,697)	(61,401)	(15,234)
Common stock warrant repurchase	0	0	(1,000)
Net cash used in financing activities	(102,533)	(122,523)	(71,964)
Net decrease in cash and cash equivalents	9,893	(3,678)	(133,024)
Cash and cash equivalents at beginning of year	1,163	4,841	137,865
Cash and cash equivalents at end of year	$ 11,056	$ 1,163	$ 4,841