Cash and Cash Equivalents and Restricted Cash (Tables)

6 Months Ended

Jun. 30, 2011

Cash and Cash Equivalents and Restricted Cash [Abstract]

Cash and cash equivalents and restricted cash balances

	June 30, 2011				December 31, 2010
	Unrestricted		Restricted		Unrestricted		Restricted
	($ in thousands)
Cash and cash equivalents and restricted cash:
Cash and due from banks(1)	$	257,618	$	46,882	$	576,276	$	58,814
Interest-bearing deposits in other banks(2)		147,667		—		70,383		10,213
Other short-term investments(3)		1,175,981		54,374		173,791		59,559
Total cash and cash equivalents and restricted cash	$	1,581,266	$	101,256	$	820,450	$	128,586