Employee Benefit Plans (Details Narrative) (USD $) In Thousands, unless otherwise specified	3 Months Ended				12 Months Ended
	Mar. 31, 2013 Pension Benefit Plan	Mar. 31, 2012 Pension Benefit Plan	Mar. 31, 2013 Other Benefits Plan	Mar. 31, 2012 Other Benefits Plan	Dec. 31, 2012 Other Benefit Plan
Benfit plan, cash contributions	$ 600	$ 800	$ 700	$ 800
Expected cash contributions	2,700		1,500
Annual benefits paid	300
Decrease in employee benefit plan's liability due to amendment					$ 10,200