OTHER INTANGIBLE ASSETS (Tables)

12 Months Ended

Dec. 31, 2016

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of changes in other intangible assets

The following table presents changes in other intangible assets for the periods presented:



	Core Deposit Premium			Mortgage Servicing Rights			Total
	(Dollars in thousands)
Balance as of December 31, 2014	$	10,029		$	19,668		$	29,697
Additions	—			2,314			2,314
Amortization	(2,674		)	(4,185		)	(6,859		)
Balance as of December 31, 2015	$	7,355		$	17,797		$	25,152
Additions	—			3,048			3,048
Amortization	(2,675		)	(5,066		)	(7,741		)
Balance as of December 31, 2016	$	4,680		$	15,779		$	20,459

Schedule of gross carrying value and accumulated amortization related to intangible assets

The gross carrying value, accumulated amortization and net carrying value related to our other intangible assets are presented below:



	December 31, 2016							December 31, 2015
	Gross Carrying Value		Accumulated Amortization			Net Carrying Value		Gross Carrying Value		Accumulated Amortization			Net Carrying Value
	(Dollars in thousands)
Core deposit premium	$	44,642	$	(39,962	)	$	4,680	$	44,642	$	(37,287	)	$	7,355
Mortgage servicing rights	62,049		(46,270		)	15,779		59,001		(41,204		)	17,797
Total	$	106,691	$	(86,232	)	$	20,459	$	103,643	$	(78,491	)	$	25,152

Schedule of estimated amortization expense

Based on our other intangible assets held as of December 31, 2016, estimated amortization expense for the next five succeeding fiscal years and all years thereafter are as follows:



	Estimated Amortization Expense
	Core Deposit Premium		Mortgage Servicing Rights		Total
	(Dollars in thousands)
2017	$	2,674	$	2,623	$	5,297
2018	2,006		2,176		4,182
2019	—		1,848		1,848
2020	—		1,597		1,597
2021	—		1,345		1,345
Thereafter	—		6,190		6,190
Total	$	4,680	$	15,779	$	20,459

Schedule of fair market value and key assumptions used in determining the fair market value of our mortgage servicing rights

The following table presents the fair market value and key assumptions used in determining the fair market value of our mortgage servicing rights:



	Year Ended December 31,
	2016			2015
	(Dollars in thousands)
Fair market value, beginning of period	$	18,345		$	19,975
Fair market value, end of period	18,087			18,345
Weighted average discount rate	9.5		%	9.5		%
Weighted average prepayment speed assumption	14.3		%	14.3		%