Retirement Arrangements (Tables)

12 Months Ended

Dec. 31, 2010

Retirement Arrangements (Tables) [Abstract]

Reconciliation of changes in SERP's benefit obligations and statement of fund status

	Year Ended
	December 31,
	2010		2009
Reconciliation of benefit obligation:
Obligation at January 1	$	3,287	$	3,109
Service cost		413		389
Interest cost		115		164
Actuarial (gain) loss		251		434
Benefit Payments		—		(29	)
Curtailments		—		(780	)
Obligation at December 31	$	4,066	$	3,287

	December 31,
	2010		2009
Funded status:
Funded status at December 31	$	4,066	$	(3,287	)
Unrecognized (gain) loss		—		—
Prepaid (accrued) benefit cost	$	4,066	$	(3,287	)

Components of net periodic benefit costs

	Year Ended
	December 31,
	2010		2009
Service cost	$	413	$	389
Interest cost		115		164
Curtailment income		—		(87	)
Net actuarial (gain) loss		52		16
Net periodic benefit cost	$	580	$	482

Accumulated benefit in excess of plan assets

	December 31,
	2010		2009
Projected benefit obligation	$	4,066	$	3,287
Accumulated benefit obligation		2,938		2,956
Fair value of assets		n/a		n/a

Weighted-average assumptions used to determine benefit obligations and net periodic benefit cost for SERP

	Benefit Obligations						Net Periodic Benefit Cost
	December 31,						Year Ended December 31,
	2010			2009			2010			2009
Discount rate		3.50	%		3.50	%		3.50	%		6.25	%
Rate of compensation increase		4.50	%		4.50	%		4.50	%		4.50	%
Expected long-term return on plan assets		n/a			n/a			n/a			n/a