Employee Benefit Plans (Details 1) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Pension Benefit Plan
Change in Fair Value of Plan Assets:
Fair Value of plan assets, Beginning Balance	$ 37,904	$ 32,196
Actual Return on Plan Assets	6,779	3,879
Employer Contributions	3,610	3,661
Benefits Paid	(1,850)	(1,832)
Fair Value of plan assets, Ending Balance	46,443	37,904
Funded Status	(9,598)	(24,913)
Other Benefits Plan
Change in Fair Value of Plan Assets:
Fair Value of plan assets, Beginning Balance	20,408	15,817
Actual Return on Plan Assets	2,553	1,241
Employer Contributions	2,673	3,940
Benefits Paid	(489)	(590)
Fair Value of plan assets, Ending Balance	25,145	20,408
Funded Status	$ (12,067)	$ (30,200)