Employee Benefits (Tables)

12 Months Ended

Dec. 31, 2011

Employee Benefits [Abstract]

Schedule Of Change In Benefit Obligation

	Pension Benefits						Post-retirement Healthcare
	2011			2010			2011			2010
Change in benefit obligation
Benefit obligation, beginning of year	$	54,033		$	52,059		$	20,047		$	21,048
Service cost		930			938			16			45
Interest cost		2,723			2,751			840			919
Actuarial loss (gain)		4,358			326			816			(656	)
Benefits paid		(2,168	)		(2,041	)		(1,507	)		(1,309	)
Benefit obligation, end of year	$	59,876		$	54,033		$	20,212		$	20,047

Schedule Of Change In Plan Assets

Change in plan assets
Fair value of plan assets, beginning of year	$	32,867		$	28,580		$	—		$	—
Actual return		833			3,782			—			—
Employer contribution		3,946			2,546			1,507			1,309
Benefits paid		(2,168	)		(2,041	)		(1,507	)		(1,309	)
Fair value of plan assets, end of year	$	35,478		$	32,867		$	—		$	—
Funded status, end of year	$	(24,398	)	$	(21,166	)	$	(20,212	)	$	(20,047	)

Schedule Of Amounts Recognized In The Consolidated Balance Sheet

Amounts recognized in the consolidated balance sheet at December 31
Current liabilities	$	—		$	—		$	(1,710	)	$	(1,590	)
Noncurrent liabilities		(24,398	)		(21,166	)		(18,502	)		(18,457	)
Net amount recognized	$	(24,398	)	$	(21,166	)	$	(20,212	)	$	(20,047	)

Schedule Of Amounts Recognized In Accumulated Other Comprehensive Income

Amounts recognized in accumulated other comprehensive income
Net loss	$	20,325	$	15,791	$	3,523	$	2,825
Transition obligation		—		—		—		114
Prior service cost		890		1,187		218		404
Total before tax (1)	$	21,215	$	16,978	$	3,741	$	3,343

(1) For 2011, after-tax totals for pension benefits and post-retirement healthcare benefits were $12,873 and $2,270, respectively. The sum of these amounts ($15,143) is reflected in stockholders' equity as accumulated other comprehensive income. For 2010, after-tax totals for pension benefits and post-retirement healthcare benefits were $10,300 and $2,028, respectively. The sum of these amounts ($12,328) is reflected in stockholders' equity as accumulated other comprehensive income.

Schedule Of Accumulated Benefit Obligations In Excess Of Plan Assets

	Pension Benefits
	2011			2010
Information for pension plans with an accumulated benefit obligation in excess of plan assets
Projected benefit obligation	$	(59,876	)	$	(54,033	)
Accumulated benefit obligation		(54,508	)		(49,602	)
Fair value of plan assets		35,478			32,867

Schedule Of Net Benefit Costs And Amounts Recognized In Other Comprehensive Income

	Pension Benefits									Post-retirement Healthcare
	Year Ended December 31,									Year Ended December 31,
	2011			2010			2009			2011			2010			2009
Components of net periodic benefit cost
Service cost	$	930		$	938		$	842		$	16		$	45		$	85
Interest cost		2,723			2,751			2,465			840			919			1,067
Expected return on plan assets		(2,279	)		(1,935	)		(1,652	)		—			—			—
Net amortization		1,567			1,899			1,646			418			377			427
Net periodic benefit cost	$	2,941		$	3,653		$	3,301		$	1,274		$	1,341		$	1,579
Other changes in plan assets and benefit obligation recognized in other comprehensive income (OCI)
Net loss (gain) emerging	$	5,804		$	(1,521	)	$	3,804		$	816		$	(656	)	$	1,039
Prior service cost		—			—			1,484			—			—			—
Amortization of net loss		(1,271	)		(1,602	)		(1,381	)		(118	)		(51	)		(101	)
Amortization of transition obligation		—			—			—			(114	)		(114	)		(114	)
Amortization of prior service cost		(296	)		(297	)		(265	)		(186	)		(212	)		(212	)
Total recognized in OCI	$	4,237		$	(3,420	)	$	3,642		$	398		$	(1,033	)	$	612
Total net periodic benefit cost and OCI	$	7,178		$	233		$	6,943		$	1,672		$	308		$	2,191

Schedule Of Weighted Average Assumptions Used

	Pension Benefits									Post-retirement Healthcare
	2011			2010			2009			2011			2010			2009
Weighted average assumptions used to determine benefit obligations at December 31
Discount rate		4.5	%		5.3	%		5.5	%		4.0	%		4.5	%		5.0	%
Expected return on plan assets		7.0	%		7.0	%		7.0	%		—			—			—
Rate of compensation increase		4.0	%		4.0	%		4.0	%		—			—			—
Weighted average assumptions used to determine net periodic benefit costs for years ended December 31
Discount rate		5.3	%		5.5	%		6.0	%		4.5	%		5.0	%		5.8	%
Expected return on plan assets		7.0	%		7.0	%		7.0	%		—			—			—
Rate of compensation increase		4.0	%		4.0	%		4.0	%		—			—			—

Schedule Of Fair Value Of Pension Plan Assets

	2011						2010
	Level 2		Level 3		Total		Level 2		Level 3		Total
Bank collective trust funds—Equity securities:
Large-cap index funds (1)	$	17,562	$	—	$	17,562	$	15,007	$	—	$	15,007
Small-cap index funds (2)		2,324		—		2,324		3,220		—		3,220
International index funds (3)		3,367		—		3,367		3,216		—		3,216
Bank collective trust funds—Fixed income:
Bond index funds (4)		11,806		—		11,806		10,957		—		10,957
Short term investment funds		—		419		419		—		467		467
	$	35,059	$	419	$	35,478	$	32,400	$	467	$	32,867

(1) Over 90% of the assets of these funds are invested in large-cap U.S. companies. The remainder of the assets of these funds is invested in cash reserves.

(2) Over 95% of the assets of these funds are invested in small-cap U.S. companies. The remainder of the assets of these funds is invested in cash reserves.

(3) At least 90% of the assets of these funds are invested in international companies in developed markets (excluding the U.S. and Canada). The remainder of the assets of these funds is invested in cash reserves.

(4) This category represents investment grade bonds of U.S. issuers, including U.S. Treasury notes.

Schedule Of Estimated Future Benefit Payments

	Pension Benefits		Post- retirement Healthcare
Estimated future benefit payments:
Year 1	$	2,381	$	1,710
Year 2		2,651		1,937
Year 3		2,895		2,113
Year 4		3,141		2,144
Year 5		3,303		1,999
Years 6 to 10		18,698		6,594