Accrued Expenses And Other Liabilities (Components Of Accrued Expenses And Other Liabilities) (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Payables and Accruals [Abstract]
Accrued compensation	$ 43,352	$ 43,761
Customer deposits and deferred revenue	44,705	34,571
Current portion of accrued warranty	18,411	15,711
Other	10,031	8,442
Total	$ 116,499	$ 102,485