Retirement Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Business Combinations and Acquisitions, Benefit Obligation	$ 21,407,000	$ 0
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate Support, Methodology and Source Data	.5
Defined Benefit Plan, Interest Cost	780,000	1,109,000	1,306,000
Defined Benefit Plan, Actual Return on Plan Assets	0	0	0
Defined Benefit Plan, Amortization of Gains (Losses)	(1,205,000)	1,418,000	(289,000)
Defined Benefit Plan, Net Periodic Benefit Cost	(425,000)	2,527,000	1,017,000
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Defined Benefit Plan, Benefit Obligation	28,674,000	29,214,000
Defined Benefit Plan, Interest Cost	780,000	1,109,000	1,306,000
Defined Benefit Plan, Actuarial Net (Gains) Losses	(856,000)	1,806,000
Defined Benefit Plan, Benefits Paid	(12,506,000)	(3,455,000)
Defined Benefit Plan, Benefit Obligation	37,499,000	28,674,000	29,214,000
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Defined Benefit Plan, Fair Value of Plan Assets	0	0
Defined Benefit Plan, Contributions by Employer	12,506,000	3,455,000
Defined Benefit Plan, Benefits Paid	(12,506,000)	(3,455,000)
Defined Benefit Plan, Fair Value of Plan Assets	0	0	0
Defined Benefit Plan, Funded Status of Plan	(37,499,000)	(28,674,000)
Defined Benefit Plan, Amounts Recognized in Balance Sheet	(37,499,000)	(28,674,000)
Defined Benefit Plan, Accumulated Benefit Obligation	37,499,000	28,674,000
Defined Benefit Pension Plan, Liabilities	(37,499,000)	(28,674,000)
Defined Benefit Pension Plan, Liabilities, Noncurrent	35,629,000	27,374,000
Defined Benefit Plan, Estimated Amount of Plan Participants' Future Benefits Covered by Insurance Contracts Issued by Employer or Related Parties	47,400,000	49,800,000
Cash Surrender Value of Life Insurance, Retirement Plans	35,800,000	37,200,000
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	3.66%	2.90%	4.05%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	2.90%	4.05%	4.41%
2012	4,274,000
2013	3,995,000
2014	3,768,000
2015	3,482,000
2016	3,286,000
Years 2017 through 2021	13,397,000
Defined Contribution Plan, Cost Recognized	$ 24,300,000	$ 23,100,000	$ 22,300,000