v3.10.0.1
Schedule I, Condensed Financial Statements, of condensed cash flow statements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Condensed cash flow statements [Abstract]      
Cash Flow from operating activities $ 401,043 $ 385,623 $ 334,418
Cash Flow-investing activities [Abstract]      
B. Net cash (used in)/provided by investing activities (14,860) 71,368 (26,359)
Cash Flow-financing activities [Abstract]      
Dividend paid to shareowner (143,034) (99,483) (35,509)
C. Net cash provided by/(used in) financing activities (405,231) (416,327) (226,103)
Net increase/(decrease) in cash and cash equivalents (19,048) 40,664 81,956
Cash, cash equivalents and bank overdrafts at beginning of the year 669,387 594,811 514,712
Cash and cash equivalents at the end of the year 631,542 669,387 594,811
Parent Company [Member]      
Condensed cash flow statements [Abstract]      
Cash Flow from operating activities (30,571) 34,937 5,911
Cash Flow-investing activities [Abstract]      
Decrease (increase) in investment and advance to affiliates 66,069 151,033 97,341
Net decrease (increase) in other assets 0 0 0
B. Net cash (used in)/provided by investing activities 66,069 151,033 97,341
Cash Flow-financing activities [Abstract]      
Net increase/(decrease) in borrowings and other liabilities 56,000 (64,754) 0
Dividend paid to shareowner (133,289) (94,845) (26,585)
Capital increase and other 0 0 0
C. Net cash provided by/(used in) financing activities (77,289) (159,599) (26,585)
Net increase/(decrease) in cash and cash equivalents (41,791) 26,371 76,667
Cash, cash equivalents and bank overdrafts at beginning of the year 148,525 122,154 45,487
Cash and cash equivalents at the end of the year $ 106,734 $ 148,525 $ 122,154