Goodwill and Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill and Other Intangible Assets [Abstract]

Summary of core deposit intangibles and other intangibles

		2013		2012		2011
	($ in Thousands)
Core deposit intangibles:
Gross carrying amount	$	36,230	$	41,831	$	41,831
Accumulated amortization		(31,565)		(34,044)		(30,815)
Net book value	$	4,665	$	7,787	$	11,016
Amortization during the year	$	3,122	$	3,229	$	3,695
Other intangibles:
Gross carrying amount	$	19,283	$	19,283	$	19,283
Accumulated amortization		(12,764)		(11,843)		(10,877)
Net book value	$	6,519	$	7,440	$	8,406
Amortization during the year	$	921	$	966	$	1,019

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

		2013			2012				2011
		($ in Thousands)
Mortgage servicing rights
Mortgage servicing rights at beginning of year		$	61,425		$	75,855		$	84,209
	Additions		18,256			23,528			17,476
	Amortization		(15,488)			(23,348)			(25,830)
	Other-than-temporary impairment		―			(14,610)			―
Mortgage servicing rights at end of year		$	64,193		$	61,425		$	75,855
Valuation allowance at beginning of year			(15,476)			(27,703)			(20,300)
	(Additions) recoveries, net		14,563			(2,383)			(7,403)
	Other-than-temporary impairment		―			14,610			―
Valuation allowance at end of year			(913)			(15,476)			(27,703)
Mortgage servicing rights, net		$	63,280		$	45,949		$	48,152
Fair value of mortgage servicing rights		$	74,444		$	45,949		$	48,152
Portfolio of residential mortgage loans serviced for others
	("servicing portfolio")	$	8,084,000		$	7,453,000		$	7,321,000
Mortgage servicing rights, net to servicing portfolio			0.78	%		0.62	%		0.66	%
Mortgage servicing rights expense(1)		$	925		$	25,731		$	33,233

Summary of estimated future amortization expense

Estimated Amortization Expense	Core Deposit		Other			Mortgage Servicing
	Intangibles		Intangibles			Rights
Year ending December 31,		($ in Thousands)
2014	$	2,868	$	879	$	10,009
2015		1,404		839		8,412
2016		281		803		7,058
2017		112		770		5,952
2018		―		740		5,033
Beyond 2018		―		2,488		27,729
Total Estimated Amortization Expense	$	4,665	$	6,519	$	64,193