Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Entity-Wide Disclosure (Schedule of Revenues by Geographic Area) (Details)

v3.19.3.a.u2
Entity-Wide Disclosure (Schedule of Revenues by Geographic Area) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Segment Reporting Information [Line Items]      
Revenues $ 636,080 $ 663,237 $ 668,362
Americas (primarily the United States) [Member]      
Segment Reporting Information [Line Items]      
Revenues 415,862 409,741 413,326
Europe and Middle East [Member]      
Segment Reporting Information [Line Items]      
Revenues 124,967 147,162 148,279
Asia Pacific [Member]      
Segment Reporting Information [Line Items]      
Revenues $ 95,251 $ 106,334 $ 106,757