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Goodwill (Changes in Goodwill) (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Roll Forward]    
Goodwill at beginning of year $ 218,442,000 $ 193,962,000
Increase in goodwill related to acquisitions 3,843,000 25,683,000
Impairments and changes in previous estimates (101,000) (1,118,000)
Reclassification of assets held for sale 0 85,000
Decrease in Goodwill Due to Divestitures (1,097,000) 0
Goodwill at the end of the year 221,087,000 218,442,000
impairment related to discontinued operation $ 100,000