Income Taxes (Deferred Tax Liabilities (Assets)) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Depreciation	$ 10,421	$ 9,886
Goodwill	38,540	35,813
Intangible assets	9,610	9,907
Foreign withholding tax	700	1,182
Other	7,826	696
Gross deferred tax liabilities	67,097	57,484
Equity compensation	(9,963)	(10,420)
Other	(20,049)	(13,529)
Gross deferred tax assets	(30,012)	(23,949)
Valuation allowances	3,160	2,995
Deferred tax assets, net of valuation allowances	(26,852)	(20,954)
Net deferred tax liabilities	$ 40,245	$ 36,530