CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 4,407	$ 771
Restricted cash	22,173	22,112
Accounts receivable, net	184,452	143,107
Deferred income taxes	6,775	4,640
Other current assets	14,790	14,364
Assets of discontinued operations	860	1,092
Current assets before funds held for clients	233,457	186,086
Funds held for clients	126,787	164,389
Total current assets	360,244	350,475
Property and equipment, net	19,532	19,167
Goodwill and other intangible assets, net	491,908	469,083
Assets of deferred compensation plan	54,958	51,953
Deferred income taxes		542
Other assets	5,789	6,238
Total assets	932,431	897,458
Current liabilities:
Accounts payable	34,697	37,529
Income taxes payable	12,161	25
Accrued personnel costs	22,514	38,568
Notes payable	754	1,602
Contingent purchase price liability-current	13,112	12,243
Other current liabilities	16,569	12,766
Liabilities of discontinued operations	250	370
Current liabilities before client fund obligations	100,057	103,103
Client fund obligations	126,752	164,311
Total current liabilities	226,809	267,414
Convertible notes, net	125,992	125,256
Bank debt	91,400	48,500
Income taxes payable	5,123	6,154
Deferred income taxes	872
Deferred compensation plan obligations	54,958	51,953
Contingent purchase price liability-non-current	19,841	12,953
Other non-current liabilities	10,420	10,782
Total liabilities	535,415	523,012
STOCKHOLDERS' EQUITY
Common stock	1,160	1,149
Additional paid-in capital	589,713	580,576
Retained earnings	208,282	190,994
Treasury stock	(401,423)	(397,548)
Accumulated other comprehensive loss	(716)	(725)
Total stockholders' equity	397,016	374,446
Total liabilities and stockholders' equity	$ 932,431	$ 897,458