Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Provision for federal and state income taxes

	For the Years Ended December 31,
(Dollars in thousands)	2012		2011		2010
Current:
Federal	$	2,753	$	2,829	$	5,142
State		258		334		387
Deferred:
Federal		2,397		1,480		(2,162	)
State		143		133		(85	)
	$	5,551	$	4,776	$	3,282

Income tax provision differences from the expected statutory provision

	For the Years Ended December 31,
(Dollars in thousands)	2012			2011			2010
Expected provision at statutory rate		35.0	%		35.0	%		35.0	%
Difference resulting from:
Tax exempt interest income		(12.1	)		(14.0	)		(16.0	)
Increase in value of bank owned life insurance assets		(3.5	)		(2.4	)		(2.3	)
Other, including state income taxes, valuation allowance and rate differential		1.6			1.6			0.5
		21.0	%		20.2	%		17.2	%

Components of deferred tax assets and liabilities

	At December 31,
(Dollars in thousands)	2012			2011
Deferred tax assets:
Loan and lease loss	$	8,753		$	10,559
Deferred compensation		2,613			2,539
Actuarial adjustments on postretirement benefits*		7,551			6,717
Interest on nonaccrual loans		1,839			1,073
State net operating losses		1,441			987
Other-than-temporary impairments on equity securities		1,218			1,259
Alternative minimum tax credits**		1,590			—
Gross deferred tax assets		25,005			23,134
Valuation allowance		(1,432	)		(1,392	)
Total deferred tax asset, net of valuation allowance		23,573			21,742
Deferred tax liabilities:
Market discount		1,624			1,337
Retirement plans		5,100			2,183
Intangible assets		1,567			1,100
Net unrealized holding gains on securities available for sale and swaps*		3,825			3,432
Other		60			111
Total deferred tax liabilities		12,176			8,163
Net deferred tax assets	$	11,397		$	13,579

* Represents the amount of deferred taxes recorded in accumulated other comprehensive income (loss).

** The alternative minimum tax credits have an indefinite life.