Other Comprehensive Income (Tables)

6 Months Ended

Jun. 30, 2011

Other Comprehensive Income [Abstract]

Summary of activity in accumulated other comprehensive income

	Six Months Ended						Year Ended
	June 30, 2011			June 30, 2010			December 31, 2010
				($ in Thousands)
Net income (loss)	$	57,235		$	(29,168	)	$	(856	)
Other comprehensive income (loss), net of tax:
Investment securities available for sale:
Net unrealized gains (losses)		80,763			38,869			(38,278	)
Reclassification adjustment for net (gains) losses realized in net income		58			(23,435	)		(24,917	)
Income tax (expense) benefit		(31,347	)		(5,586	)		24,785
Other comprehensive income (loss) on investment securities available for sale		49,474			9,848			(38,410	)
Defined benefit pension and postretirement obligations:
Prior service cost, net of amortization		233			233			467
Net loss, net of amortization		903			810			2,271
Income tax expense		(441	)		(566	)		(1,106	)
Other comprehensive income on pension and postretirement obligations		695			477			1,632
Derivatives used in cash flow hedging relationships:
Net unrealized losses		(374	)		(3,952	)		(4,542	)
Reclassification adjustment for net losses and interest expense for interest differential on derivatives realized in net income		2,962			3,000			6,013
Income tax (expense) benefit		(1,038	)		368			(499	)
Other comprehensive income (loss) on cash flow hedging relationships		1,550			(584	)		972
Total other comprehensive income (loss)		51,719			9,741			(35,806	)
Comprehensive income (loss)	$	108,954		$	(19,427	)	$	(36,662	)