Income Taxes (Schedule Of Effective Income Tax Rate Reconciliation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015		Dec. 31, 2014
Income Taxes [Abstract]
Computed expected tax expense	$ 3,458	$ 10,845		$ 23,516
Foreign tax differential	(88)	(7,676)		(17,955)
State income tax expense, net of federal income tax benefit	310	220		55
Subpart F income	711	597		1,106
Adjustment to contingent consideration	(634)
Increase in uncertain tax positions	36	17		38
Non-deductible stock-based compensation	155	134		112
Change in valuation allowance	(15)	(152)		167
Other	(89)	267		152
Total income tax expense (benefit)	$ 3,844	$ 4,252	[1]	$ 7,191	[1]

[1] Amounts for the years ended December 31, 2015 and 2014 have been restated for immaterial corrections of identified errors relating to prepaid loan fees (see Note 2 (b) "Correction of Immaterial Errors").