Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2013

Goodwill and Other Intangible Assets [Abstract]

Summary of core deposit intangibles and other intangibles

	Nine Months Ended		Year Ended
	September 30, 2013		December 31, 2012
		($ in Thousands)
Core deposit intangibles:
Gross carrying amount	$	36,231	$	41,831
Accumulated amortization		(30,785)		(34,044)
Net book value	$	5,446	$	7,787
Amortization during the period	$	2,341	$	3,229
Other intangibles:
Gross carrying amount	$	19,283	$	19,283
Accumulated amortization		(12,534)		(11,843)
Net book value	$	6,749	$	7,440
Amortization during the period	$	691	$	966

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

		Nine Months Ended			Year Ended
		September 30, 2013			December 31, 2012
			($ in Thousands)
Mortgage servicing rights:
Mortgage servicing rights at beginning of period		$	61,425		$	75,855
	Additions		15,968			23,528
	Amortization		(12,479)			(23,348)
	Other-than-temporary impairment		―			(14,610)
Mortgage servicing rights at end of period		$	64,914		$	61,425
Valuation allowance at beginning of period			(15,476)			(27,703)
	(Additions) / Recoveries, net		14,097			(2,383)
	Other-than-temporary impairment		―			14,610
Valuation allowance at end of period			(1,379)			(15,476)
Mortgage servicing rights, net		$	63,535		$	45,949
Fair value of mortgage servicing rights		$	69,214		$	45,949
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)			8,014,000			7,453,000
Mortgage servicing rights, net to servicing portfolio			0.79	%		0.62	%
Mortgage servicing rights expense(1)		$	(1,618)		$	25,731

Summary of estimated future amortization expense

	Core Deposit		Other		Mortgage Servicing
Estimated amortization expense:	Intangibles		Intangibles		Rights
		($ in Thousands)
Three months ending December 31, 2013	$	780	$	231	$	2,884
Year ending December 31, 2014		2,868		879		10,412
Year ending December 31, 2015		1,405		839		8,554
Year ending December 31, 2016		281		803		7,090
Year ending December 31, 2017		112		770		5,900
Year ending December 31, 2018		―		740		4,930
Beyond 2018		―		2,487		25,144
Total Estimated Amortization Expense		5,446		6,749		64,914