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Significant Accounting Policies Other Assets (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Cash Surrender Value of Life Insurance $ 36,869us-gaap_CashSurrenderValueOfLifeInsurance $ 32,075us-gaap_CashSurrenderValueOfLifeInsurance
Equity Method Investments 2,336us-gaap_EquityMethodInvestments 1,907us-gaap_EquityMethodInvestments
Deferred Finance Costs, Noncurrent, Net 2,328us-gaap_DeferredFinanceCostsNoncurrentNet 1,646us-gaap_DeferredFinanceCostsNoncurrentNet
Other Assets, Miscellaneous, Noncurrent 4,304us-gaap_OtherAssetsMiscellaneousNoncurrent 3,952us-gaap_OtherAssetsMiscellaneousNoncurrent
Other Assets, Noncurrent $ 45,837us-gaap_OtherAssetsNoncurrent $ 39,580us-gaap_OtherAssetsNoncurrent