Income Taxes (Schedule Of Income Tax Reconciliation Items) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014	[1]
Income Taxes [Abstract]
Expected tax provision		$ 4,566	$ 9,581	[1]	$ 5,739
Foreign tax rate differential		(648)	(654)	[1]	1,252
Change in valuation allowance		129	1,531	[1]	(16,580)
Indefinite reinvestment assertion	[1]		(3,089)
State and local tax provision		307	1,133	[1]	461
State rate and law change	[1]		(3,635)
Prior year adjustments		(954)	(514)	[1]
Unrecognized tax benefits		262	946	[1]	700
Other		358	(151)	[1]	(497)
Actual tax provision (benefit)		$ 4,020	$ 5,148	[1],[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).