CONDENSED STATEMENTS OF INCOME-PARENT COMPANY ONLY (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Expense
Interest on subordinated debentures	$ 3,092	$ 7,425	$ 9,178
Income before income tax benefit	62,968	131,664	112,716
Income tax (benefit)	9,581	32,754	25,172
Net Income	53,387	98,910	87,544
Parent Company [Member]
Income
Equity in undistributed net loss earnings of subsidiaries	(24,961)	(110,930)	88,604
Dividends from subsidiaries	79,900	214,992	7,300
Interest and other income	2,206	913	266
Total Income	57,145	104,975	96,170
Expense
Interest on subordinated debentures	3,092	7,425	7,299
Other operating expenses	1,502	1,392	5,794
Total Expense	4,594	8,817	13,093
Income before income tax benefit	52,551	96,158	83,077
Income tax (benefit)	(836)	(2,752)	(4,467)
Net Income	53,387	98,910	87,544
Earning of subsidiaries	$ 54,900