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QUARTERLY FINANCIAL DATA (Tables) | 12 Months Ended
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Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract] |
Schedule of Quarterly Financial Information | Summarized quarterly results for the two years ended December 31, 2014 and 2013 were as follows:
|  | Three Months Ended
2014 |  | March 31 |  | June 30 |  | September 30 |  | December 31 |  | Full Year
Revenues |  | $ | 160,384 |  |  | $ | 174,695 |  |  | $ | 192,764 |  |  | $ | 202,184 |  |  | $ | 730,027 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of revenues (exclusive of depreciation and amortization) |  | 102,454 |  |  | 110,102 |  |  | 122,509 |  |  | 121,465 |  |  | 456,530 |
Selling, general and administrative expenses |  | 32,359 |  |  | 38,671 |  |  | 42,875 |  |  | 49,761 |  |  | 163,666 |
Depreciation and amortization expense |  | 3,689 |  |  | 5,451 |  |  | 5,510 |  |  | 2,833 |  |  | 17,483 |
Goodwill impairment loss |  | — |  |  | — |  |  | — |  |  | 2,241 |  |  | 2,241 |
Other operating (income)/ expenses, net |  | 25 |  |  | 1,995 |  |  | 35 |  |  | 1,869 |  |  | 3,924 |
Income from operations |  | 21,857 |  |  | 18,476 |  |  | 21,835 |  |  | 24,015 |  |  | 86,183 |
Interest and other income, net |  | 976 |  |  | 1,164 |  |  | 1,261 |  |  | 1,368 |  |  | 4,769 |
Change in fair value of contingent consideration |  | — |  |  | — |  |  | — |  |  | (1,924 | ) |  | (1,924 | )
Foreign exchange loss |  | (1,241 | ) |  | (1,239 | ) |  | (718 | ) |  | 1,123 |  |  | (2,075 | )
Income before provision for income taxes |  | 21,592 |  |  | 18,401 |  |  | 22,378 |  |  | 24,582 |  |  | 86,953 |
Provision for income taxes |  | 4,228 |  |  | 3,587 |  |  | 3,338 |  |  | 6,159 |  |  | 17,312 |
Net income |  | $ | 17,364 |  |  | $ | 14,814 |  |  | $ | 19,040 |  |  | $ | 18,423 |  |  | $ | 69,641 |
Comprehensive income |  | $ | 13,787 |  |  | $ | 17,708 |  |  | $ | 10,780 |  |  | $ | 7,115 |  |  | $ | 49,390 |
Basic net income per share(1) |  | $ | 0.37 |  |  | $ | 0.31 |  |  | $ | 0.40 |  |  | $ | 0.39 |  |  | $ | 1.48 |
Diluted net income per share(1) |  | $ | 0.35 |  |  | $ | 0.30 |  |  | $ | 0.38 |  |  | $ | 0.37 |  |  | $ | 1.40 |
(1) | Earnings per share amounts for each quarter may not necessarily total to the yearly earnings per share due to the weighting of shares outstanding on a quarterly and year to date basis.
|  | Three Months Ended
2013 |  | March 31 |  | June 30 |  | September 30 |  | December 31 |  | Full Year
Revenues |  | $ | 124,198 |  |  | $ | 133,184 |  |  | $ | 140,150 |  |  | $ | 157,585 |  |  | $ | 555,117 |
Operating expenses: |  |  |  |  |  |  |  |  |  |  |  |
Cost of revenues (exclusive of depreciation and amortization) |  | 77,937 |  |  | 83,547 |  |  | 88,539 |  |  | 97,627 |  |  | 347,650 |
Selling, general and administrative expenses |  | 27,083 |  |  | 28,541 |  |  | 27,893 |  |  | 32,980 |  |  | 116,497 |
Depreciation and amortization expense |  | 3,617 |  |  | 3,854 |  |  | 3,906 |  |  | 3,743 |  |  | 15,120 |
Goodwill impairment loss |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Other operating (income)/ expenses, net |  | 25 |  |  | (293 | ) |  | (418 | ) |  | 43 |  |  | (643 | )
Income from operations |  | 15,536 |  |  | 17,535 |  |  | 20,230 |  |  | 23,192 |  |  | 76,493 |
Interest and other income, net |  | 630 |  |  | 769 |  |  | 846 |  |  | 832 |  |  | 3,077 |
Change in fair value of contingent consideration |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Foreign exchange loss |  | (499 | ) |  | (869 | ) |  | (720 | ) |  | (712 | ) |  | (2,800 | )
Income before provision for income taxes |  | 15,667 |  |  | 17,435 |  |  | 20,356 |  |  | 23,312 |  |  | 76,770 |
Provision for income taxes |  | 2,987 |  |  | 3,317 |  |  | 3,919 |  |  | 4,553 |  |  | 14,776 |
Net income |  | $ | 12,680 |  |  | $ | 14,118 |  |  | $ | 16,437 |  |  | $ | 18,759 |  |  | $ | 61,994 |
Comprehensive income |  | $ | 10,337 |  |  | $ | 13,073 |  |  | $ | 19,412 |  |  | $ | 18,361 |  |  | $ | 61,183 |
Basic net income per share(1) |  | $ | 0.28 |  |  | $ | 0.31 |  |  | $ | 0.36 |  |  | $ | 0.40 |  |  | $ | 1.35 |
Diluted net income per share(1) |  | $ | 0.27 |  |  | $ | 0.29 |  |  | $ | 0.34 |  |  | $ | 0.38 |  |  | $ | 1.28 |
(1) | Earnings per share amounts for each quarter may not necessarily total to the yearly earnings per share due to the weighting of shares outstanding on a quarterly and year to date basis.

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- Definition Tabular disclosure of the quarterly financial data in the annual financial statements. The disclosure includes financial information for each fiscal quarter for the current and previous year, including revenues, gross profit, income (loss) before extraordinary items and cumulative effect of a change in accounting principle and earnings per share data. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 270 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a)-(j) -URI http://asc.fasb.org/extlink&oid=35737889&loc=d3e1280-108306 + Details
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