Benefit Plans (Details 3) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Expected Long-Term Return	7.00%	7.00%
Target Allocation	100%
Defined Benefit Plan Weighted Average Asset Allocations	100.00%	100.00%
Estimated Future Benefit Payments
Expected company contributions in the following fiscal year	$ 200
Expected Benefit Payments:
In the first year following the disclosure date	108
In the second year following the disclosure date	76
In the third year following the disclosure date	130
In the fourth year following the disclosure date	127
In the fifth year following the disclosure date	90
In the sixth year following the disclosure date	$ 813
Equity Securities [Member]
Expected Long-Term Return	8.50%
Target Allocation	55%
Defined Benefit Plan Weighted Average Asset Allocations	77.00%	68.00%
Debt Securities [Member]
Expected Long-Term Return	5.50%
Target Allocation	45%
Defined Benefit Plan Weighted Average Asset Allocations	23.00%	32.00%