Business Segments (Principal Geographical Areas) (Details) - USD ($) $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Principal Geographical Areas Information | |||||||||||
Revenues | $ 1,183,284 | $ 1,123,137 | $ 1,120,085 | $ 1,028,156 | $ 1,193,068 | $ 1,199,505 | $ 1,247,274 | $ 1,117,361 | $ 4,454,662 | $ 4,757,208 | $ 4,973,076 |
Assets | 4,387,752 | 4,264,123 | 4,387,752 | 4,264,123 | |||||||
United States | |||||||||||
Principal Geographical Areas Information | |||||||||||
Revenues | 4,180,206 | 4,613,644 | 4,802,393 | ||||||||
Assets | 4,225,143 | 4,093,673 | 4,225,143 | 4,093,673 | |||||||
Foreign and U.S. Territories [Member] | |||||||||||
Principal Geographical Areas Information | |||||||||||
Revenues | 274,456 | 143,564 | $ 170,683 | ||||||||
Assets | $ 162,609 | $ 170,450 | $ 162,609 | $ 170,450 |