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Segment Disclosures - Summary of Segment Information (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 180,885 | $ 172,229 | $ 389,793 | $ 373,418
Operating expenses | 162,307 | 151,091 | 328,494 | 310,480
Gross margin | 18,578 | 21,138 | 61,299 | 62,938
Corporate general & admin | 8,306 | 7,649 | 18,565 | 17,633
Operating income (loss) | 10,272 | 13,489 | 42,734 | 45,305
Other income (expense): |  |  |  |
Interest expense | (3,577) | (4,145) | (7,010) | (8,201)
Gain on sale of operations, net | 68 | 48 | 76 | 66
Other (expense) income, net | 3,936 | 515 | 5,911 | 2,243
Total other (expense) income | 427 | (3,582) | (1,023) | (5,892)
Income (loss) from continuing operations before income tax expense | 10,699 | 9,907 | 41,711 | 39,413
Financial Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 119,082 | 113,527 | 264,502 | 254,452
Operating expenses | 104,591 | 98,721 | 214,613 | 203,603
Gross margin | 14,491 | 14,806 | 49,889 | 50,849
Operating income (loss) | 14,491 | 14,806 | 49,889 | 50,849
Other income (expense): |  |  |  |
Other (expense) income, net | (58) | 339 | 41 | 376
Total other (expense) income | (58) | 339 | 41 | 376
Income (loss) from continuing operations before income tax expense | 14,433 | 15,145 | 49,930 | 51,225
Employee Services [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 54,479 | 51,488 | 110,588 | 104,266
Operating expenses | 45,936 | 42,868 | 91,671 | 85,490
Gross margin | 8,543 | 8,620 | 18,917 | 18,776
Operating income (loss) | 8,543 | 8,620 | 18,917 | 18,776
Other income (expense): |  |  |  |
Interest expense | (8) |  | (16) | (8)
Gain on sale of operations, net |  |  |  |
Other (expense) income, net | 89 | 74 | 375 | 175
Total other (expense) income | 81 | 74 | 359 | 167
Income (loss) from continuing operations before income tax expense | 8,624 | 8,694 | 19,276 | 18,943
National Practices [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 7,324 | 7,214 | 14,703 | 14,700
Operating expenses | 6,685 | 6,875 | 13,318 | 13,825
Gross margin | 639 | 339 | 1,385 | 875
Operating income (loss) | 639 | 339 | 1,385 | 875
Other income (expense): |  |  |  |
Income (loss) from continuing operations before income tax expense | 639 | 339 | 1,385 | 875
Corporate and Other [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Operating expenses | 5,095 | 2,627 | 8,892 | 7,562
Gross margin | (5,095) | (2,627) | (8,892) | (7,562)
Corporate general & admin | 8,306 | 7,649 | 18,565 | 17,633
Operating income (loss) | (13,401) | (10,276) | (27,457) | (25,195)
Other income (expense): |  |  |  |
Interest expense | (3,569) | (4,145) | (6,994) | (8,193)
Gain on sale of operations, net | 68 | 48 | 76 | 66
Other (expense) income, net | 3,905 | 102 | 5,495 | 1,692
Total other (expense) income | 404 | (3,995) | (1,423) | (6,435)
Income (loss) from continuing operations before income tax expense | $ (12,997) | $ (14,271) | $ (28,880) | $ (31,630)

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