Credit Facility	6 Months Ended
Jun. 30, 2016
Short-term Debt [Abstract]
Credit Facility	On October 30, 2015, the Company and certain domestic subsidiaries (collectively with the Company, the “U.S. Borrowers”), certain Canadian subsidiaries of the Company (collectively, the "Canadian Borrowers"), and certain UK subsidiaries of the Company (collectively, the "UK Borrowers"), collectively (the "Borrowers") entered into an agreement for a secured lending facility (the "Credit Agreement") with Bank of America, N.A. and other lenders. The Credit Agreement established a $150.0 million revolving line of credit facility which also includes an option to expand the facility by up to $75.0 million subject to agreement by the lenders, with a five-year term ending on October 30, 2020. The facility is comprised initially of three subfacilities with $122.5 million available to the U.S. borrowers, $15.0 million available to the Canadian borrowers and $12.5 million available to the UK borrowers. It also includes a $30.0 million sublimit for swingline loans and a $20.0 million sublimit for letters of credit. Availability under the Credit Agreement is tied to a borrowing base, measured by 85% of eligible billed accounts receivable, plus 80% of eligible unbilled accounts receivable, less customary reserve amounts; provided however that the portion of the borrowing base consisting of 80% of eligible unbilled accounts receivable may not exceed 30% of the sum of (i) 85% of the eligible billed accounts receivable, plus (ii) 80% of the eligible unbilled accounts receivable. Borrowings under the Credit Agreement may be used by the Company and the other Borrowers for general business purposes including capital expenditures and permitted acquisitions and investments. Accounts receivable, used in the determination of the borrowing base, are subject to lender discretion and, in certain circumstances, the lender may use cash balances in a dominion account established with the administrative agent to repay outstanding balances. As a result, amounts borrowed under the Credit Agreement are presented as current in the consolidated balance sheets. The Borrowers’ obligations under the Credit Agreement are secured by a first lien security interest in all of the Borrowers’ personal property (subject to customary exceptions), including, among other things, accounts receivable, equity interests, deposit accounts, intellectual property, and leased properties where books and records are kept. As of June 30, 2016, the Company had total outstanding borrowings of $25.9 million, letters of credit outstanding of $3.3 million and $116.2 million available to borrow under the Credit Agreement. The Company was in compliance with all covenants under the Credit Agreement as of June 30, 2016. Interest was payable at rates ranging from 1.71% to 1.76% per annum for outstanding borrowings as of June 30, 2016. As of December 31, 2015, the Company had total outstanding borrowings of $18.8 million, letters of credit outstanding of $3.3 million and $120.7 million available to borrow under the Credit Agreement. The Company was in compliance with all covenants under the Credit Agreement as of December 31, 2015.

On October 30, 2015, the Company and certain domestic subsidiaries (collectively with the Company, the “U.S. Borrowers”), certain Canadian subsidiaries of the Company (collectively, the "Canadian Borrowers"), and certain UK subsidiaries of the Company (collectively, the "UK Borrowers"), collectively (the "Borrowers") entered into an agreement for a secured lending facility (the "Credit Agreement") with Bank of America, N.A. and other lenders. The Credit Agreement established a $150.0 million revolving line of credit facility which also includes an option to expand the facility by up to $75.0 million subject to agreement by the lenders, with a five-year term ending on October 30, 2020. The facility is comprised initially of three subfacilities with $122.5 million available to the U.S. borrowers, $15.0 million available to the Canadian borrowers and $12.5 million available to the UK borrowers. It also includes a $30.0 million sublimit for swingline loans and a $20.0 million sublimit for letters of credit.

Availability under the Credit Agreement is tied to a borrowing base, measured by 85% of eligible billed accounts receivable, plus 80% of eligible unbilled accounts receivable, less customary reserve amounts; provided however that the portion of the borrowing base consisting of 80% of eligible unbilled accounts receivable may not exceed 30% of the sum of (i) 85% of the eligible billed accounts receivable, plus (ii) 80% of the eligible unbilled accounts receivable. Borrowings under the Credit Agreement may be used by the Company and the other Borrowers for general business purposes including capital expenditures and permitted acquisitions and investments. Accounts receivable, used in the determination of the borrowing base, are subject to lender discretion and, in certain circumstances, the lender may use cash balances in a dominion account established with the administrative agent to repay outstanding balances. As a result, amounts borrowed under the Credit Agreement are presented as current in the consolidated balance sheets.

The Borrowers’ obligations under the Credit Agreement are secured by a first lien security interest in all of the Borrowers’ personal property (subject to customary exceptions), including, among other things, accounts receivable, equity interests, deposit accounts, intellectual property, and leased properties where books and records are kept.

As of June 30, 2016, the Company had total outstanding borrowings of $25.9 million, letters of credit outstanding of $3.3 million and $116.2 million available to borrow under the Credit Agreement. The Company was in compliance with all covenants under the Credit Agreement as of June 30, 2016. Interest was payable at rates ranging from 1.71% to 1.76% per annum for outstanding borrowings as of June 30, 2016.

As of December 31, 2015, the Company had total outstanding borrowings of $18.8 million, letters of credit outstanding of $3.3 million and $120.7 million available to borrow under the Credit Agreement. The Company was in compliance with all covenants under the Credit Agreement as of December 31, 2015.