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Acquisitions and Dispositions (Summary of Allocation of Fair Value of Amounts Recognized) (Details)
$ in Thousands
Mar. 31, 2017
USD ($)
Property, Plant and Equipment [Line Items]  
Recognized Identifiable Assets Acquired and Liabilities Assumed, Buildings $ 108,924
Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill 6,497
Recognized Identifiable Assets Acquired and Liabilities Assumed, Assets $ 115,421