Mortgage Banking Activities (Tables)

12 Months Ended

Dec. 31, 2012

Mortgage Banking Activities [Abstract]

Principal balance of mortgage servicing rights

	2012		2011
Mortgage loan portfolios serviced for:
FHLMC	$	817,108	$	770,131
FNMA		316,142		361,535

Capitalized mortgage servicing rights

	2012			2011			2010
	(Dollars in thousands)
Balance, beginning of year	$	6,375		$	6,400		$	6,228
Originations		2,395			2,204			2,621
Amortized to expense		(2,584	)		(2,229	)		(2,449	)
Balance, end of year		6,186			6,375			6,400
Less valuation allowance		(680	)		(1,785	)		(285	)
Net balance	$	5,506		$	4,590		$	6,115

Valuation allowance for mortgage servicing rights

	2012			2011			2010
	(Dollars in thousands)
Balance, beginning of year	$	(1,785	)	$	(285	)	$	(423	)
Impairment charges		(1,179	)		(1,727	)		(1,279	)
Recoveries		2,284			227			1,417
Balance, end of year	$	(680	)	$	(1,785	)	$	(285	)

Key economic assumptions in measuring the value of mortgage servicing rights

	2012			2011
Weighted average prepayment rate		401 PSA			475 PSA
Weighted average life (in years)		3.93			3.70
Weighted average discount rate		8	%		8	%

Estimated amortization expense

	(Dollars in thousands)
2013	$	1,352
2014		1,252
2015		1,157
2016		1,107
2017		776