Goodwill and Identifiable Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill by segment

The table below illustrates goodwill by segment for the years ended December 31, 2015 and 2014 ($ in thousands):

	General
	Banking			Insurance		Total
Balance as of January 1, 2014	$	328,483		$	44,368	$	372,851
Measurement period adjustment during 2014		(7,351	)		—		(7,351	)
Balance as of December 31, 2014		321,132			44,368		365,500
Goodwill from purchase of insurance book of business during 2015		—			656		656
Balance as of December 31, 2015	$	321,132		$	45,024	$	366,156

Schedule of identifiable intangible assets

At December 31, 2015 and 2014, identifiable intangible assets consisted of the following ($ in thousands):

	December 31, 2015						December 31, 2014
	GrossCarrying		Accumulated		Net Carrying		Gross Carrying		Accumulated		Net Carrying
	Amount		Amortization		Amount		Amount		Amortization		Amount
Core deposit intangibles	$	85,824	$	61,603	$	24,221	$	85,824	$	54,464	$	31,360
Insurance intangibles		13,824		11,117		2,707		11,693		10,566		1,127
Banking charters		1,325		811		514		1,325		745		580
Borrower relationship intangible		690		586		104		690		523		167
Total	$	101,663	$	74,117	$	27,546	$	99,532	$	66,298	$	33,234

The following table illustrates the carrying amounts and remaining weighted-average amortization periods of identifiable intangible assets as of December 31, 2015 ($ in thousands):

			Remaining
			Weighted-
			Average
	Net Carrying		Amortization
	Amount		Period in Years
Core deposit intangibles	$	24,221		6.6
Insurance intangibles		2,707		15.0
Banking charters		514		7.7
Borrower relationship intangible		104		1.7
Total	$	27,546		7.4