Credit Facility	9 Months Ended
Sep. 30, 2016
Debt Disclosure [Abstract]
Credit Facility	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 borrowing capacity of up to $150.0 million, with an increase provision conditioned on approval by the lending group, to a borrowing capacity of $200.0 million. In addition, the Credit Facility has a $7.5 million sub-limit for the issuance of standby letters of credit. At September 30, 2016 and December 31, 2015, no amounts were outstanding under the Credit Facility. As of September 30, 2016, the Company had the capacity to draw on the full amount of the Credit Facility. 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%. 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 credit agreement governing the Credit Facility also contains customary provisions regarding events of default which could result in an acceleration or increase in amounts due, including (subject to certain materiality thresholds and grace periods) payment default, failure to comply with covenants, material inaccuracy of a representation or warranty, bankruptcy or insolvency proceedings, change of control, certain judgments, ERISA matters, cross-default to other debt agreements, governmental action prohibiting or restricting the company or its subsidiaries in a manner that has a material adverse effect and failure of certain guaranty obligations. The lenders (and their respective affiliates) may have provided, and may in the future provide, investment banking, cash management, underwriting, lending, commercial banking, leasing, foreign exchange, trust or other advisory services to the company and its subsidiaries and affiliates. These parties may have received, and may in the future receive, customary compensation for these services.

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 borrowing capacity of up to $150.0 million, with an increase provision conditioned on approval by the lending group, to a borrowing capacity of $200.0 million. In addition, the Credit Facility has a $7.5 million sub-limit for the issuance of standby letters of credit. At September 30, 2016 and December 31, 2015, no amounts were outstanding under the Credit Facility. As of September 30, 2016, the Company had the capacity to draw on the full amount of the Credit Facility. 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%. 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 credit agreement governing the Credit Facility also contains customary provisions regarding events of default which could result in an acceleration or increase in amounts due, including (subject to certain materiality thresholds and grace periods) payment default, failure to comply with covenants, material inaccuracy of a representation or warranty, bankruptcy or insolvency proceedings, change of control, certain judgments, ERISA matters, cross-default to other debt agreements, governmental action prohibiting or restricting the company or its subsidiaries in a manner that has a material adverse effect and failure of certain guaranty obligations. The lenders (and their respective affiliates) may have provided, and may in the future provide, investment banking, cash management, underwriting, lending, commercial banking, leasing, foreign exchange, trust or other advisory services to the company and its subsidiaries and affiliates. These parties may have received, and may in the future receive, customary compensation for these services.