Segment Disclosures - Summary of Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Segment Reporting Information [Line Items]
Revenue	$ 208,908	$ 201,189
Operating expenses	166,187	159,389
Gross margin	42,721	41,800
Corporate general & admin	10,259	9,984
Operating income (loss)	32,462	31,816
Other income (expense):
Interest expense	(3,433)	(4,056)
Gain on sale of operations, net	8	18
Other income, net	1,975	1,728
Total other income (expense)	(1,450)	(2,310)
Income (loss) from continuing operations before income tax expense	31,012	29,506
Financial Services [Member]
Segment Reporting Information [Line Items]
Revenue	145,420	140,925
Operating expenses	110,022	104,882
Gross margin	35,398	36,043
Corporate general & admin
Operating income (loss)	35,398	36,043
Other income (expense):
Interest expense
Gain on sale of operations, net
Other income, net	99	37
Total other income (expense)	99	37
Income (loss) from continuing operations before income tax expense	35,497	36,080
Employee Services [Member]
Segment Reporting Information [Line Items]
Revenue	56,109	52,778
Operating expenses	45,735	42,622
Gross margin	10,374	10,156
Corporate general & admin
Operating income (loss)	10,374	10,156
Other income (expense):
Interest expense	(8)	(8)
Gain on sale of operations, net
Other income, net	286	101
Total other income (expense)	278	93
Income (loss) from continuing operations before income tax expense	10,652	10,249
National Practices [Member]
Segment Reporting Information [Line Items]
Revenue	7,379	7,486
Operating expenses	6,633	6,950
Gross margin	746	536
Corporate general & admin
Operating income (loss)	746	536
Other income (expense):
Interest expense
Gain on sale of operations, net
Other income, net
Total other income (expense)
Income (loss) from continuing operations before income tax expense	746	536
Corporate and Other [Member]
Segment Reporting Information [Line Items]
Revenue
Operating expenses	3,797	4,935
Gross margin	(3,797)	(4,935)
Corporate general & admin	10,259	9,984
Operating income (loss)	(14,056)	(14,919)
Other income (expense):
Interest expense	(3,425)	(4,048)
Gain on sale of operations, net	8	18
Other income, net	1,590	1,590
Total other income (expense)	(1,827)	(2,440)
Income (loss) from continuing operations before income tax expense	$ (15,883)	$ (17,359)