Goodwill and Other Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2014

Goodwill and Other Intangible Assets [Abstract]

Summary of core deposit intangibles and other intangibles

	Nine Months Ended		Year Ended
	September 30, 2014		December 31, 2013
		($ in Thousands)
Core deposit intangibles:
Gross carrying amount	$	36,230	$	36,230
Accumulated amortization		(33,878)		(31,565)
Net book value	$	2,352	$	4,665
Amortization during the period	$	2,313	$	3,122
Other intangibles:
Gross carrying amount	$	19,283	$	19,283
Accumulated amortization		(13,423)		(12,764)
Net book value	$	5,860	$	6,519
Amortization during the period	$	659	$	921

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

		Nine Months Ended			Year Ended
		September 30, 2014			December 31, 2013
			($ in Thousands)
Mortgage servicing rights:
Mortgage servicing rights at beginning of period		$	64,193		$	61,425
	Additions		5,844			18,256
	Amortization		(8,224)			(15,488)
Mortgage servicing rights at end of period		$	61,813		$	64,193
Valuation allowance at beginning of period			(913)			(15,476)
	Recoveries, net		89			14,563
Valuation allowance at end of period			(824)			(913)
Mortgage servicing rights, net		$	60,989		$	63,280
Fair value of mortgage servicing rights		$	69,940		$	74,444
Portfolio of residential mortgage loans serviced for others (“servicing portfolio”)			8,012,000			8,084,000
Mortgage servicing rights, net to servicing portfolio			0.76	%		0.78	%
Mortgage servicing rights expense (1)		$	8,135		$	925

Summary of estimated future amortization expense

	Core Deposit		Other		Mortgage Servicing
Estimated amortization expense:	Intangibles		Intangibles		Rights
		($ in Thousands)
Three months ending December 31, 2014	$	555	$	220	$	2,773
Year ending December 31, 2015		1,404		839		9,760
Year ending December 31, 2016		281		803		8,084
Year ending December 31, 2017		112		770		6,727
Year ending December 31, 2018		―		740		5,621
Year ending December 31, 2019		―		441		4,721
Beyond 2019		―		2,047		24,127
Total Estimated Amortization Expense	$	2,352	$	5,860	$	61,813