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Basis of Presentation and Summary of Significant Accounting Policies (PPE) (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
building
Mar. 31, 2013
Dec. 31, 2013
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 252,079,000   $ 249,317,000
Less: accumulated depreciation (90,250,000)   (88,627,000)
Property, plant and equipment, net 161,829,000   160,690,000
Number of buildings purchased 2    
Depreciation expense 2,200,000 2,200,000  
Land [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 56,890,000   55,639,000
Buildings and improvements [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross 133,196,000   132,172,000
Furniture, equipment and automobiles [Member]
      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, gross $ 61,993,000   $ 61,506,000