XML 87 R68.htm IDEA: XBRL DOCUMENT v2.4.1.9
Inventory, net (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Composition of Inventory net of reserves      
Parts and supplies $ 269,370,000us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves $ 233,216,000us-gaap_InventoryRawMaterialsAndSuppliesNetOfReserves  
Work in progress 100,499,000us-gaap_InventoryWorkInProcessNetOfReserves 139,763,000us-gaap_InventoryWorkInProcessNetOfReserves  
Finished goods 33,702,000us-gaap_InventoryFinishedGoodsNetOfReserves 40,948,000us-gaap_InventoryFinishedGoodsNetOfReserves  
Inventory, net 403,571,000us-gaap_InventoryNet 413,927,000us-gaap_InventoryNet  
Inventory write-downs 8,000,000us-gaap_InventoryWriteDown 4,500,000us-gaap_InventoryWriteDown 1,000,000us-gaap_InventoryWriteDown
Inventory reserves $ 20,200,000us-gaap_InventoryValuationReserves $ 14,100,000us-gaap_InventoryValuationReserves