Shareholders' Equity (Notes)

3 Months Ended

Mar. 31, 2018

Shareholders' Equity [Abstract]

Stockholders' Equity Note Disclosure [Text Block]

On November 29, 2017, the Board of Directors of the Company authorized a $500.0 million share repurchase program in a "modified Dutch auction" tender offer utilizing a portion of the proceeds from the Big Fish Transaction. The Company completed the tender offer on February 12, 2018, and repurchased 1,886,792 shares of the Company's common stock at a purchase price of $265 per share with an aggregate cost of $500.0 million, excluding fees and expenses related to the tender offer.