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Goodwill and Other Intangible Assets (Schedule of Expected Amortization Expense) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Goodwill and Intangible Assets Disclosure [Abstract]  
December 31, 2015 $ 10,391us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
December 31, 2016 9,209us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
December 31, 2017 8,161us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
December 31, 2018 7,273us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
December 31, 2019 6,500us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
Total estimated future amortization $ 41,534fmer_Finitelivedintangibleassetsfutureamortizationexpensetotalfornextfiveyears