Stockholders Equity (Tables)

12 Months Ended

Dec. 31, 2011

Equity [Abstract]

Summary of activity in accumulated other comprehensive income

					Years Ended December 31,
					2011		2010			2009
					($ in Thousands)
Net income (loss)					$	139,699		$	(856)	$	(131,859)
Other comprehensive income (loss), net of tax:
	Investment securities available for sale:
		Net unrealized gains (losses)				71,606			(38,278)		113,455
		Reclassification adjustment for net (gains) losses realized in net income				1,112			(24,917)		(8,774)
		Income tax (expense) benefit				(28,566)			24,785		(37,534)
			Other comprehensive income (loss) on investment securities
				available for sale		44,152			(38,410)		67,147
	Defined benefit pension and postretirement obligations:
		Prior service cost, net of amortization				467			467		467
		Net gain (loss), net of amortization				(14,810)			2,271		2,736
		Income tax (expense) benefit				5,674			(1,106)		(1,236)
			Other comprehensive income (loss) on pension and postretirement			(8,669)			1,632		1,967
				obligations
	Derivatives used in cash flow hedging relationships:
		Net unrealized losses				(557)			(4,542)		(1,814)
		Reclassification adjustment for net losses and interest
			expense for interest differential on derivative instruments
				realized in net income (loss)		4,708			6,013		8,540
		Income tax expense				(1,658)			(499)		(2,718)
			Other comprehensive income on cash flow hedging
				relationships		2,493			972		4,008
				Total other comprehensive income (loss)		37,976			(35,806)		73,122
Comprehensive income (loss)					$	177,675		$	(36,662)	$	(58,737)