Equity (Notes)	9 Months Ended
Sep. 30, 2017
Equity [Abstract]
Equity	EQUITY Common Stock The Company has one class of common stock with a par value of $0.001 per share. There are 250 million shares of common stock authorized for issuance. Holders of common stock are entitled to one vote per share on all matters presented to the stockholders. Common Stock Repurchase Program For the three and nine months ended September 30, 2017, the Company repurchased 2.1 million and 3.4 million shares of its common stock, respectively, at a cost of $17.1 million and $27.1 million, including commissions, respectively, including unsettled trades for 150,000 shares totaling $1.4 million, which were completed on October 2, 2017. During the three and nine months ended September 30, 2016, the Company did not repurchase any of its common stock. As of September 30, 2017, the Company had remaining authorization to repurchase approximately $91.7 million of its common stock, subject to restrictions under its Credit Agreement. See Part II - Other Information, Item 2. ‘Unregistered Sales of Equity Securities’ for further details on repurchases of common stock during the three months ended September 30, 2017. Preferred Stock The Company has authorized and available for issuance 4.0 million shares of preferred stock. None of these preferred shares are issued or outstanding. Series A Convertible Preferred Stock The Company is authorized to issue up to 1.0 million shares of Series A Convertible Preferred Stock (“Series A Preferred Stock”), par value $0.001 per share, of which 0.2 million shares were issued to Blackstone and certain of its permitted transferees in January 2014. The Series A Preferred Stock has a stated value of $1,000 per share. Participation Rights and Dividends Holders of the Series A Preferred Stock are entitled to receive dividends declared or paid on the Company’s common stock and are entitled to vote together with the holders of the Company’s common stock as a single class, in each case, on an as-converted basis. Holders of the Series A Preferred Stock also have certain limited special approval rights, including with respect to the issuance of pari passu or senior equity securities of the Company. The Series A Preferred Stock ranks senior to the Company’s common stock with respect to rights to preferred dividends, liquidation, winding-up, and dissolution. Holders of Series A Preferred Stock are entitled to cumulative dividends payable quarterly in cash at a rate of 6% per annum. If the Company fails to make timely dividend payments, the dividend rate will increase to 8% per annum until such time as all accrued but unpaid dividends have been paid in full. As of September 30, 2017 and December 31, 2016, the Company had accrued preferred dividends of $3.0 million, which are reported in ‘Accrued expenses and other liabilities’ in the condensed consolidated balance sheets. These accrued dividends were paid in cash in October 2017 and January 2017, respectively. Conversion Rights of the Company and Blackstone The Series A Preferred Stock is convertible at the option of the holders at any time into shares of common stock at a conversion price of $14.50 per share, subject to adjustment for customary anti-dilution provisions. Beginning January 27, 2017, provided the closing price of the Company’s common stock has been equal to or greater than $29.00 for 20 consecutive trading days, the Company may elect to convert all or a portion of the Series A Preferred Stock into an equivalent number of shares of common stock. At September 30, 2017, had the holders converted or the Company been entitled to exercise its conversion right, the Series A Preferred Stock would have been convertible into 13,793,100 shares of common stock. Redemption Rights of the Company and Blackstone The Company has the option to redeem the Series A Preferred Stock anytime on or after January 27, 2022, for 100% of the stated redemption value of $200 million plus all accrued and unpaid dividends. Blackstone has the option to cause the redemption of the Series A Preferred Stock any time after January 27, 2022, or upon a change in control. Further, upon certain change of control events, Blackstone can require the Company to repurchase the Series A Preferred Stock at 101% of the redemption value plus all accrued and unpaid dividends. The carrying value of the Series A Preferred Stock is accreted up to its $200 million redemption value on a straight-line basis through the redemption date.

EQUITY

Common Stock

The Company has one class of common stock with a par value of $0.001 per share. There are 250 million shares of common stock authorized for issuance. Holders of common stock are entitled to one vote per share on all matters presented to the stockholders.

Common Stock Repurchase Program

For the three and nine months ended September 30, 2017, the Company repurchased 2.1 million and 3.4 million shares of its common stock, respectively, at a cost of $17.1 million and $27.1 million, including commissions, respectively, including unsettled trades for 150,000 shares totaling $1.4 million, which were completed on October 2, 2017. During the three and nine months ended September 30, 2016, the Company did not repurchase any of its common stock. As of September 30, 2017, the Company had remaining authorization to repurchase approximately $91.7 million of its common stock, subject to restrictions under its Credit Agreement. See Part II - Other Information, Item 2. ‘Unregistered Sales of Equity Securities’ for further details on repurchases of common stock during the three months ended September 30, 2017.

Preferred Stock

The Company has authorized and available for issuance 4.0 million shares of preferred stock. None of these preferred shares are issued or outstanding.

Series A Convertible Preferred Stock

The Company is authorized to issue up to 1.0 million shares of Series A Convertible Preferred Stock (“Series A Preferred Stock”), par value $0.001 per share, of which 0.2 million shares were issued to Blackstone and certain of its permitted transferees in January 2014. The Series A Preferred Stock has a stated value of $1,000 per share.

Participation Rights and Dividends

Holders of the Series A Preferred Stock are entitled to receive dividends declared or paid on the Company’s common stock and are entitled to vote together with the holders of the Company’s common stock as a single class, in each case, on an as-converted basis. Holders of the Series A Preferred Stock also have certain limited special approval rights, including with respect to the issuance of pari passu or senior equity securities of the Company.

The Series A Preferred Stock ranks senior to the Company’s common stock with respect to rights to preferred dividends, liquidation, winding-up, and dissolution. Holders of Series A Preferred Stock are entitled to cumulative dividends payable quarterly in cash at a rate of 6% per annum. If the Company fails to make timely dividend payments, the dividend rate will increase to 8% per annum until such time as all accrued but unpaid dividends have been paid in full. As of September 30, 2017 and December 31, 2016, the Company had accrued preferred dividends of $3.0 million, which are reported in ‘Accrued expenses and other liabilities’ in the condensed consolidated balance sheets. These accrued dividends were paid in cash in October 2017 and January 2017, respectively.

Conversion Rights of the Company and Blackstone

The Series A Preferred Stock is convertible at the option of the holders at any time into shares of common stock at a conversion price of $14.50 per share, subject to adjustment for customary anti-dilution provisions. Beginning January 27, 2017, provided the closing price of the Company’s common stock has been equal to or greater than $29.00 for 20 consecutive trading days, the Company may elect to convert all or a portion of the Series A Preferred Stock into an equivalent number of shares of common stock. At September 30, 2017, had the holders converted or the Company been entitled to exercise its conversion right, the Series A Preferred Stock would have been convertible into 13,793,100 shares of common stock.

Redemption Rights of the Company and Blackstone

The Company has the option to redeem the Series A Preferred Stock anytime on or after January 27, 2022, for 100% of the stated redemption value of $200 million plus all accrued and unpaid dividends.

Blackstone has the option to cause the redemption of the Series A Preferred Stock any time after January 27, 2022, or upon a change in control. Further, upon certain change of control events, Blackstone can require the Company to repurchase the Series A Preferred Stock at 101% of the redemption value plus all accrued and unpaid dividends. The carrying value of the Series A Preferred Stock is accreted up to its $200 million redemption value on a straight-line basis through the redemption date.