CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
CURRENT ASSETS:
Cash and cash equivalents	$ 66,051	$ 81,319
Accounts receivable, net	132,838	148,738
Prepaid expenses and other current assets	9,023	9,897
Income taxes receivable	26,228	7,057
Deferred tax assets, current portion	6,056	1,556
Current assets held for sale	0	32,802
Total current assets	240,196	281,369
Assets held for sale, less current portion	0	55,642
Property and equipment, net	27,421	28,006
Goodwill	402,254	388,922
Intangible assets acquired in business combinations, net	39,586	48,501
Deferred tax assets, less current portion	331	12,422
Other assets	2,027	2,913
TOTAL ASSETS	711,815	817,775
CURRENT LIABILITIES:
Accounts payable and accrued expenses	108,015	126,472
Other current liabilities	6,691	4,057
Liabilities related to assets held for sale	0	7,646
Total current liabilities	114,706	138,175
Income taxes payable, less current portion	23,342	24,050
Deferred tax liabilities, less current portion	4,818	855
Borrowings under credit agreement	55,000	140,000
Other non-current liabilities	9,372	8,740
Liabilities related to assets held for sale, less current portion	0	1,058
TOTAL LIABILITIES	207,238	312,878
Commitments and contingencies (Note 10)
STOCKHOLDERS' EQUITY:
Convertible preferred stock, $0.001 par value; 20,000,000 shares authorized; no shares issued or outstanding at September 30, 2014 and December 31, 2013	0	0
Common stock, $0.001 par value; 500,000,000 shares authorized; 64,344,772 and 66,828,670 shares issued and outstanding at September 30, 2014 and December 31, 2013, respectively	64	67
Additional paid-in capital	458,414	461,822
Accumulated other comprehensive loss	(10,125)	(2,722)
Retained earnings	56,224	45,730
Total stockholders' equity	504,577	504,897
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 711,815	$ 817,775