Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Mar. 31, 2012

Goodwill and Other Intangible Assets [Abstract]

Summary of core deposit intangibles and other intangibles

	Three Months Ended		Year Ended
	March 31, 2012		December 31, 2011
		($ in Thousands)
Core deposit intangibles:
Gross carrying amount	$	41,831	$	41,831
Accumulated amortization		(31,622)		(30,815)
Net book value	$	10,209	$	11,016
Amortization during the period	$	807	$	3,695
Other intangibles:
Gross carrying amount	$	19,283	$	19,283
Accumulated amortization		(11,119)		(10,877)
Net book value	$	8,164	$	8,406
Amortization during the period	$	242	$	1,019

Summary of changes in balance of mortgage servicing rights asset and mortgage servicing rights valuation allowance

		Three Months Ended			Year Ended
		March 31, 2012			December 31, 2011
			($ in Thousands)
Mortgage servicing rights:
Mortgage servicing rights at beginning of period		$	75,855		$	84,209
	Additions		5,895			17,476
	Amortization		(6,417)			(25,830)
	Other-than-temporary impairment		(12,122)			―
Mortgage servicing rights at end of period		$	63,211		$	75,855
Valuation allowance at beginning of period			(27,703)			(20,300)
	(Additions) / Recoveries, net		2,371			(7,403)
	Other-than-temporary impairment		12,122			―
Valuation allowance at end of period			(13,210)			(27,703)
Mortgage servicing rights, net		$	50,001		$	48,152
Fair value of mortgage servicing rights		$	50,001		$	48,152
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)			7,284,000			7,321,000
Mortgage servicing rights, net to servicing portfolio			0.69	%		0.66	%
Mortgage servicing rights expense(1)		$	4,046		$	33,233

Summary of estimated future amortization expense

	Core Deposit		Other		Mortgage Servicing
	Intangibles		Intangibles		Rights
		($ in Thousands)
Nine months ending December 31, 2012	$	2,400	$	700	$	11,100
Year ending December 31, 2013		3,100		900		11,700
Year ending December 31, 2014		2,900		900		8,700
Year ending December 31, 2015		1,400		800		6,700
Year ending December 31, 2016		300		800		5,200
Year ending December 31, 2017		100		800		4,100