Employee Benefit Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Change in Benefit Obligation [Roll Forward]
Benefit obligation, beginning of year	$ 0	$ 5,994,000	$ 5,407,000
Service cost		0	0
Interest cost		168,000	320,000
Actuarial loss (gain)		0	299,000
Benefits paid		(7,572,000)	(32,000)
Increase in obligation due to settlement		1,410,000	0
Benefit obligation, end of year		0	5,994,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets, beginning of year	0	5,343,000	4,897,000
Actual return on plan assets		39,000	451,000
Employer contributions		2,268,000	27,000
Benefits paid		(7,572,000)	(32,000)
Fair value of plan assets, ending		0	5,343,000
Funded Status, recognized as accrued benefit cost included in other liabilities		0	651,000
Amounts Recognized in Accumulated Other Comprehensive Loss [Abstract]
Net (Gain) / Loss		0	234,000
Prior service costs		0	0
Deferred income tax benefit		0	(80,000)
Total amount recognized in accumulated other comprehensive loss		0	154,000
Components of Net Periodic Benefit Cost [Abstract]
Service cost		0	0
Interest cost		168,000	320,000
Expected return on plan assets		(53,000)	(386,000)
Amortization of prior service cost		0	0
Recognized net gain due to curtailment		620,000	0
Recognized net actuarial loss		1,117,000	0
Net periodic benefit cost		1,852,000	(66,000)
Other Change in Plan Assets and Benefit Obligations Recognized in Accumulated Other Comprehensive (Income) Loss [Abstract]
Net (gain) loss		(234,000)	234,000
Amortization of prior service cost		0	0
Deferred income tax expense (benefit)		80,000	(80,000)
Total recognized in other comprehensive (income) loss	0	(154,000)	154,000
Total recognized in net periodic benefit costs and other comprehensive (income) loss		1,698,000	88,000
Weighted-Average Assumptions for Benefit Obligations [Abstract]
Discount rate (in hundredths)			5.50%
Expected return on plan assets (in hundredths)			8.00%
Rate of compensation increase (in hundredths)			4.00%
Weighted Average Assumptions for Net Periodic Benefit Cost [Abstract]
Discount rate (in hundredths)			6.00%
Expected return on plan assets (in hundredths)			8.00%
Rate of compensation increase (in hundredths)			4.00%
Defined Benefit Plan Disclosure [Line Items]
Number of deferred compensation plans	2	2
Deferred compensation expense	204,000	133,000	150,000
Money Purchase Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Matching contributions vesting period	5 years
Expense attributable to the plan	940,000	826,000	762,000
Minimum qualifying age under plan	21
Service period	1 year
Minimum number of hours for allocation of an employer contribution (in hours)	1,000
Employer contribution (in hundredths)	6.50%
Additional contribution by employer (in hundredths)	2.75%
401(k) Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employees contribution, maximum (in hundredths)	100.00%
Matching contribution (in hundredths)	50.00%
Percentage of employer matching contribution to employees compensation (in hundredths)	6.00%
Matching contributions vesting period	5 years
Expense attributable to the plan	$ 308,000	$ 250,000	$ 258,000
Deferred Compensation Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Variable rate basis	10-year treasury
Basis spread on credit rate (in hundredths)	1.50%