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Inventories (Components Of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Inventories [Abstract]    
Raw materials $ 46,850us-gaap_InventoryRawMaterialsNetOfReserves $ 34,144us-gaap_InventoryRawMaterialsNetOfReserves
Work in process 2,304us-gaap_InventoryWorkInProcessNetOfReserves 3,050us-gaap_InventoryWorkInProcessNetOfReserves
Finished goods and parts 47,491us-gaap_InventoryFinishedGoodsNetOfReserves 37,954us-gaap_InventoryFinishedGoodsNetOfReserves
Inventories, net $ 96,645us-gaap_InventoryNet $ 75,148us-gaap_InventoryNet