Annual report pursuant to Section 13 and 15(d)

SEGMENT DATA Geographical Region Information (Details)

v3.6.0.2
SEGMENT DATA Geographical Region Information (Details) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Concentration Risk [Line Items]                      
Revenue $ 1,797,544 $ 3,170,416 $ 2,179,258 $ 1,207,716 $ 1,736,725 $ 2,622,917 $ 1,765,777 $ 1,120,312 $ 8,354,934 $ 7,245,731 $ 6,866,964
Long-lived assets 751,536       731,282       751,536 731,282 695,337
Total Foreign Operations [Member]                      
Concentration Risk [Line Items]                      
Revenue                 2,566,047 2,207,431 2,364,088
Long-lived assets 174,160       200,711       174,160 200,711 177,206
United Kingdom Operations [Member]                      
Concentration Risk [Line Items]                      
Revenue                 683,457 672,802 772,445
Long-lived assets 69,380       74,517       69,380 74,517 71,269
Other Foreign Operations [Member]                      
Concentration Risk [Line Items]                      
Revenue                 1,882,590 1,534,629 1,591,643
Long-lived assets 104,780       126,194       104,780 126,194 105,937
Total Domestic Operations [Member]                      
Concentration Risk [Line Items]                      
Revenue                 5,788,887 5,038,300 4,502,876
Long-lived assets $ 577,376       $ 530,571       $ 577,376 $ 530,571 $ 518,131
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]                      
Concentration Risk [Line Items]                      
Concentration Risk, Percentage                 0.00% 0.00% 0.00%