CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY AND COMPREHENSIVE INCOME (LOSS) (USD $) In Thousands, unless otherwise specified	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2008	$ 308,463	$ 5,915	$ 9,685	$ 536,714	$ 6,195	$ 129,383	$ 996,355
Comprehensive loss:
Net loss	0	0	0	(427,621)	0	(21,315)	(448,936)
Other comprehensive income (loss):
Unrealized gains on investment securities, net of tax	0	0	0	0	5,874	0	5,874
Reclassification adjustment for investment securities gains included in net loss, net of tax	0	0	0	0	(5,004)	0	(5,004)
Change in unrealized gains on derivative instruments, net of tax	0	0	0	0	(5,755)	0	(5,755)
Pension liability adjustment, net of tax	0	0	0	0	(664)	0	(664)
Reclassification adjustments for deferred tax asset valuation allowance	0	0	0	0	(3,110)	0	(3,110)
Total comprehensive loss							(457,595)
Purchase of noncontrolling interest in SBLS LLC	0	0	2,795	0	0	(4,652)	(1,857)
Accretion of discount on preferred stock	3,299	0	0	(3,299)	0	0	0
Preferred stock dividends declared	0	0	0	(14,523)	0	0	(14,523)
Balance at Dec. 31, 2009	311,762	5,915	12,480	91,271	(2,464)	103,416	522,380
Comprehensive loss:
Net loss	0	0	0	(191,737)	0	(6,514)	(198,251)
Other comprehensive income (loss):
Unrealized gains on investment securities, net of tax	0	0	0	0	4,764	0	4,764
Reclassification adjustment for investment securities gains included in net loss, net of tax	0	0	0	0	(5,378)	0	(5,378)
Change in unrealized gains on derivative instruments, net of tax	0	0	0	0	(3,734)	0	(3,734)
Pension liability adjustment, net of tax	0	0	0	0	(4)	0	(4)
Reclassification adjustments for deferred tax asset valuation allowance	0	0	0	0	4,498	0	4,498
Total comprehensive loss							(198,105)
Accretion of discount on preferred stock	3,381	0	0	(3,381)	0	0	0
Preferred stock dividends declared	0	0	0	(16,980)	0	0	(16,980)
Balance at Dec. 31, 2010	315,143	5,915	12,480	(120,827)	(2,318)	96,902	307,295
Comprehensive loss:
Net loss	0	0	0	(41,150)	0	(2,950)	(44,100)
Other comprehensive income (loss):
Unrealized gains on investment securities, net of tax	0	0	0	0	22,676	0	22,676
Reclassification adjustment for investment securities gains included in net loss, net of tax	0	0	0	0	(3,461)	0	(3,461)
Pension liability adjustment, net of tax	0	0	0	0	(413)	0	(413)
Reclassification adjustments for deferred tax asset valuation allowance	0	0	0	0	(418)	0	(418)
Total comprehensive loss							(25,716)
Accretion of discount on preferred stock	3,466	0	0	(3,466)	0	0	0
Preferred stock dividends declared	0	0	0	(17,908)	0	0	(17,908)
Balance at Dec. 31, 2011	$ 318,609	$ 5,915	$ 12,480	$ (183,351)	$ 16,066	$ 93,952	$ 263,671