Fair Values of Assets and Liabilities (Details 2) (USD $) In Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
MSRs [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	$ (31,173)	$ (20,250)	$ (51,855)	$ (64,272)
Securities gains (losses)	0	0	0	0
Interest and fee income	0	0	0	0
Noninterest income	0	0	0	0
Total	(31,173)	(20,250)	(51,855)	(64,272)
Derivative Instrument Asset, Net [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	7,101	3,872	7,763	12,811
Securities gains (losses)	0	0	0	0
Interest and fee income	0	0	0	0
Noninterest income	456	0	(499)	0
Total	7,557	3,872	7,264	12,811
Municipal securities [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	0	0	0	0
Securities gains (losses)	0	0	0	0
Interest and fee income	0	0	0	0
Noninterest income	0	0	0	0
Total	0	0	0	0
Private label CMO [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	0	0	0	0
Securities gains (losses)	(1,029)	(2,159)	(1,941)	(7,027)
Interest and fee income	157	561	686	1,598
Noninterest income	0	0	0	0
Total	(872)	(1,598)	(1,255)	(5,429)
Asset-backed Securities [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	0	0	0	0
Securities gains (losses)	(335)	(558)	(3,771)	(4,975)
Interest and fee income	(19)	165	156	87
Noninterest income	0	0	0	0
Total	(354)	(393)	(3,615)	(4,888)
Automobile Loan [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	0	0	0	0
Securities gains (losses)	0	0	0	0
Interest and fee income	(3,627)	(3,533)	(8,852)	(7,933)
Noninterest income	(68)	8,420	3,773	22,923
Total	(3,695)	4,887	(5,079)	14,990
Equity investments [Member]
Classification of gains and losses in earnings:
Mortgage banking income (loss)	0	0	0	0
Securities gains (losses)	0	0	0	0
Interest and fee income	0	0	0	0
Noninterest income	0	0	0	0
Total	$ 0	$ 0	$ 0	$ 0