XML 23 R9.htm IDEA: XBRL DOCUMENT v3.8.0.1
Consolidated Statements of Equity (Parenthetical) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Statement of Stockholders' Equity [Abstract]      
Shares issued on compensation plan 661,256 867,196 1,313,313
Repurchase of Class A Common shares 1,004,451 2,711,865 839,859
Shares issued for acquisition 0 0 26,350,993
Common Stock, Dividends, Per Share, Declared $ 0 $ 0 $ 1.03
Cash dividends per share of common stock (USD per share) $ 0 $ 0 $ 1.03
Tax payments related to shares withheld for vested stock and RSUs $ 4,576 $ 2,681 $ 5,237