Income Taxes (Schedule Of Significant Components Of Provision For Income Taxes) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	[1]	Dec. 31, 2014	[1]
Income Taxes [Abstract]
Current income tax expense, Federal	$ 2,982	$ 481		$ 827
Current income tax expense, State	675	516		511
Current income tax expense, Foreign	4,685	3,120		1,251
Current income tax expense, Total	8,342	4,117		2,589
Deferred income tax expense (benefit), Federal	(4,197)	612		(13,611)
Deferred income tax expense (benefit), State	(422)	(940)		(1,104)
Deferred income tax expense (benefit), Foreign	297	1,359		3,201
Deferred income tax expense (benefit), Total	(4,322)	1,031		(11,514)
Total income tax expense (benefit)	$ 4,020	$ 5,148	[2]	$ (8,925)	[2]

[1] 2015 and 2014 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).

[2] Certain 2015 and 2014 balances included the restatement impact as a result of a change in accounting principle (see Note 2 - Summary of Significant Accounting Policies - Accounting Changes).