Operating Segments (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Revenues from (expenses to) external customers	$ 215,125	$ 211,828	$ 429,217	$ 420,805
Net income (loss)	55,686	52,900	107,614	100,718
Banking [Member]
Revenues from (expenses to) external customers	192,597	191,286	384,862	380,750
Net income (loss)	55,438	53,089	107,291	101,852
FMG [Member]
Revenues from (expenses to) external customers	25,274	23,210	49,708	45,620
Net income (loss)	2,933	2,254	4,603	3,557
Non-Banks [Member]
Revenues from (expenses to) external customers	(2,746)	(2,668)	(5,353)	(5,565)
Net income (loss)	$ (2,685)	$ (2,443)	$ (4,280)	$ (4,691)