Retirement Plans Fair Value of Pension Plan Investments Table (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Pension Plan Investments
Money market account	$ 7,127	$ 9,958
Mutual funds	187,958	124,620
Common / collective trust funds	86,915	89,848
Total pension plan investments	282,000	224,426
Fair Value, Inputs, Level 1 [Member]
Pension Plan Investments
Money market account	7,127	9,958
Mutual funds	187,958	124,620
Common / collective trust funds	0	0
Total pension plan investments	195,085	134,578
Fair Value, Inputs, Level 2 [Member]
Pension Plan Investments
Money market account	0	0
Mutual funds	0	0
Common / collective trust funds	86,915	89,848
Total pension plan investments	86,915	89,848
Fair Value, Inputs, Level 3 [Member]
Pension Plan Investments
Money market account	0	0
Mutual funds	0	0
Common / collective trust funds	0	0
Total pension plan investments	$ 0	$ 0