Debt	12 Months Ended
Dec. 31, 2016
Debt Disclosure [Abstract]
Debt	Debt Credit Facility On September 30, 2016, the Company entered into a new senior unsecured revolving credit facility (“Credit Facility”) replacing the previous senior secured revolving credit facility. The Credit Facility has a five-year term and provides for borrowing capacity of up to $150.0 million, with an increase provision to $200.0 million conditioned on approval by the lending group. In addition, the Credit Facility has a $7.5 million sub-limit for the issuance of standby letters of credit. At December 31, 2016 and 2015, we had $30.0 million and $0.0 million respectively, of debt outstanding under our credit facility. On February 6, 2017, the Company repaid its $30.0 million debt outstanding. Amounts outstanding under the Credit Facility bear interest at an annual rate equal to, at the Company’s option, either LIBOR for interest periods of one, two, three or six months or an alternate base rate (as defined in the Credit Facility agreement), plus, in each case, an applicable margin, that ranges from 0.75% to 2.25%. At December 31, 2016, amounts outstanding under the Credit Facility bore interest at a rate of 2.5625%. Under the terms of the Credit Facility, the Company is also required to pay certain fees, including an annual commitment fee that ranges from 0.30% to 0.45% on undrawn amounts and a letter of credit participation fee at an annual rate equal to the applicable margin as well as any applicable fronting fees, each of which is payable quarterly in arrears. The credit agreement governing the Credit Facility contains customary restrictive covenants on the Company and its subsidiaries. Restrictive covenants in the credit agreement include, but are not limited to: prohibitions on creating, incurring or assuming any liens; entering into merger arrangements; selling, leasing, transferring or otherwise disposing of assets; making a material change in the nature of the business; entering into transactions with affiliates; and incurring indebtedness through the subsidiaries. Many of these restrictions are subject to certain minimum thresholds and exceptions. Financial covenants under the credit agreement include: (i) the quarterly maintenance of a leverage ratio (total debt to adjusted EBITDA), as defined in the credit agreement, of not greater than 3.00:1.00, and (ii) a minimum interest coverage ratio (EBITDA to interest expense) for the four consecutive fiscal quarters ended before the date of determination) of not less than 4.00:1.00. The Company was in compliance with all debt covenants at December 31, 2016. Debt Financing Commitment In connection with the Merger Agreement, on December 16, 2016, the Company entered into a debt financing commitment letter (the "Commitment Letter") with Barclays Bank PLC and Morgan Stanley Senior Funding, Inc. (the “Initial Commitment Parties”). Pursuant to the Commitment Letter, the Initial Commitment Parties committed to arrange and provide the Company with a senior secured credit facility ("Loan Facility") composed of (i) a term loan of up to $475.0 million with an expected maturity of seven years from the execution date and (ii) a revolving credit facility of up to $100.0 million maturing five years after the execution date. On February 1, 2017 we issued common stock and mandatory convertible preferred stock for total net proceeds of $207.1 million and, as a result, on February 7, 2017, the term loan under the Loan Facility was reduced from $475.0 million to $260.0 million in accordance with the terms of the Commitment Letter. The availability of borrowings under the Loan Facility is subject to satisfaction of certain customary conditions which include termination and repayment of all amounts outstanding under our existing senior unsecured revolving credit facility (using cash on hand). The senior secured credit facility will contain affirmative and negative financial and operating covenants and events of default customary for facilities of this type. The credit facility will be guaranteed by the Company's domestic subsidiaries (subject to certain exceptions) and will be secured by substantially all of the Company's assets.

Debt

Credit Facility

On September 30, 2016, the Company entered into a new senior unsecured revolving credit facility (“Credit Facility”) replacing the previous senior secured revolving credit facility. The Credit Facility has a five-year term and provides for borrowing capacity of up to $150.0 million, with an increase provision to $200.0 million conditioned on approval by the lending group. In addition, the Credit Facility has a $7.5 million sub-limit for the issuance of standby letters of credit. At December 31, 2016 and 2015, we had $30.0 million and $0.0 million respectively, of debt outstanding under our credit facility. On February 6, 2017, the Company repaid its $30.0 million debt outstanding.

Amounts outstanding under the Credit Facility bear interest at an annual rate equal to, at the Company’s option, either LIBOR for interest periods of one, two, three or six months or an alternate base rate (as defined in the Credit Facility agreement), plus, in each case, an applicable margin, that ranges from 0.75% to 2.25%. At December 31, 2016, amounts outstanding under the Credit Facility bore interest at a rate of 2.5625%. Under the terms of the Credit Facility, the Company is also required to pay certain fees, including an annual commitment fee that ranges from 0.30% to 0.45% on undrawn amounts and a letter of credit participation fee at an annual rate equal to the applicable margin as well as any applicable fronting fees, each of which is payable quarterly in arrears.

The credit agreement governing the Credit Facility contains customary restrictive covenants on the Company and its subsidiaries. Restrictive covenants in the credit agreement include, but are not limited to: prohibitions on creating, incurring or assuming any liens; entering into merger arrangements; selling, leasing, transferring or otherwise disposing of assets; making a material change in the nature of the business; entering into transactions with affiliates; and incurring indebtedness through the subsidiaries. Many of these restrictions are subject to certain minimum thresholds and exceptions. Financial covenants under the credit agreement include: (i) the quarterly maintenance of a leverage ratio (total debt to adjusted EBITDA), as defined in the credit agreement, of not greater than 3.00:1.00, and (ii) a minimum interest coverage ratio (EBITDA to interest expense) for the four consecutive fiscal quarters ended before the date of determination) of not less than 4.00:1.00. The Company was in compliance with all debt covenants at December 31, 2016.

Debt Financing Commitment

In connection with the Merger Agreement, on December 16, 2016, the Company entered into a debt financing commitment letter (the "Commitment Letter") with Barclays Bank PLC and Morgan Stanley Senior Funding, Inc. (the “Initial Commitment Parties”). Pursuant to the Commitment Letter, the Initial Commitment Parties committed to arrange and provide the Company with a senior secured credit facility ("Loan Facility") composed of (i) a term loan of up to $475.0 million with an expected maturity of seven years from the execution date and (ii) a revolving credit facility of up to $100.0 million maturing five years after the execution date. On February 1, 2017 we issued common stock and mandatory convertible preferred stock for total net proceeds of $207.1 million and, as a result, on February 7, 2017, the term loan under the Loan Facility was reduced from $475.0 million to $260.0 million in accordance with the terms of the Commitment Letter.

The availability of borrowings under the Loan Facility is subject to satisfaction of certain customary conditions which include termination and repayment of all amounts outstanding under our existing senior unsecured revolving credit facility (using cash on hand). The senior secured credit facility will contain affirmative and negative financial and operating covenants and events of default customary for facilities of this type. The credit facility will be guaranteed by the Company's domestic subsidiaries (subject to certain exceptions) and will be secured by substantially all of the Company's assets.