Stockholders' Equity (Notes)	12 Months Ended
Dec. 31, 2016
Equity, Class of Treasury Stock [Line Items]
Treasury Stock [Text Block]	Stockholders' Equity On July 21, 2014, the Board of Directors approved a program authorizing the Company to repurchase up to $100.0 million of the Company’s common stock. During 2014, the Company repurchased 3.4 million shares of its common stock under this program at a cost of $100.0 million. All shares repurchased under this program were retired. This resulted in a reduction of $31.2 million in paid-in capital and a reduction of $68.8 million in retained earnings. On January 16, 2015, the Company's Board of Directors approved a $100.0 million share repurchase program. During 2015, the Company repurchased 43,000 shares of its common stock at a cost of $1.6 million. All shares repurchased under this program were retired, which resulted in a reduction of $0.4 million in paid-in capital and a reduction of $1.2 million in retained earnings. The Company's stock-based compensation plans accept shares of the Company's common stock as payment for the exercise price of stock options. During 2015 the Company received 46,174 shares, with a $2.2 million value, as payment for the exercise of stock options. Those shares were retired upon receipt, which resulted in a reduction of $0.8 million in paid-in capital and a reduction of $1.4 million in retained earnings. On June 5, 2015, the Company issued 794,700 shares of its common stock valued at $30.2 million, in connection with the acquisition of Creative Circle. On June 10, 2016, the Board of Directors approved a stock repurchase program, whereby the Company may repurchase up to $150.0 million of its common stock over the following two years. This program superseded the previous $100.0 million repurchase authorization. During 2016, the Company repurchased 1,133,553 shares of its common stock at a cost of $43.1 million. All shares repurchased under this program were retired, which resulted in a reduction of $11.9 million in paid-in capital and a reduction of $31.2 million in retained earnings.

Stockholders' Equity

On July 21, 2014, the Board of Directors approved a program authorizing the Company to repurchase up to $100.0 million of the Company’s common stock. During 2014, the Company repurchased 3.4 million shares of its common stock under this program at a cost of $100.0 million. All shares repurchased under this program were retired. This resulted in a reduction of $31.2 million in paid-in capital and a reduction of $68.8 million in retained earnings.

On January 16, 2015, the Company's Board of Directors approved a $100.0 million share repurchase program. During 2015, the Company repurchased 43,000 shares of its common stock at a cost of $1.6 million. All shares repurchased under this program were retired, which resulted in a reduction of $0.4 million in paid-in capital and a reduction of $1.2 million in retained earnings.

The Company's stock-based compensation plans accept shares of the Company's common stock as payment for the exercise price of stock options. During 2015 the Company received 46,174 shares, with a $2.2 million value, as payment for the exercise of stock options. Those shares were retired upon receipt, which resulted in a reduction of $0.8 million in paid-in capital and a reduction of $1.4 million in retained earnings.

On June 5, 2015, the Company issued 794,700 shares of its common stock valued at $30.2 million, in connection with the acquisition of Creative Circle.

On June 10, 2016, the Board of Directors approved a stock repurchase program, whereby the Company may repurchase up to $150.0 million of its common stock over the following two years. This program superseded the previous $100.0 million repurchase authorization. During 2016, the Company repurchased 1,133,553 shares of its common stock at a cost of $43.1 million. All shares repurchased under this program were retired, which resulted in a reduction of $11.9 million in paid-in capital and a reduction of $31.2 million in retained earnings.