Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 93,842	$ 77,316
Accounts receivable, net	259,833	276,432
Prepaids and other current assets	66,792	64,702
Deferred tax assets, net	22,135	22,501
Income tax receivable	2,052	4,532
Total current assets	444,654	445,483
Long-term assets
Property, plant and equipment, net	159,669	150,212
Goodwill	126,798	128,705
Deferred tax assets, net	32,022	31,512
Other intangible assets, net	53,036	59,905
Other long-term assets	47,026	36,658
Total long-term assets	418,551	406,992
Total assets	863,205	852,475
Current liabilities
Accounts payable	41,608	37,019
Accrued employee compensation and benefits	74,439	70,069
Other accrued expenses	30,474	34,430
Income taxes payable	5,755	10,141
Deferred tax liabilities, net	33	0
Deferred revenue	29,013	29,887
Other current liabilities	20,890	17,085
Total current liabilities	202,212	198,631
Long-term liabilities
Line of credit.	115,000	100,000
Deferred tax liabilities, net	3,182	4,675
Deferred rent	10,103	8,956
Other long-term liabilities	73,727	74,149
Total long-term liabilities	202,012	187,780
Total liabilities	$ 404,224	$ 386,411
Commitments and contingencies (Note 10)
Mandatorily redeemable noncontrolling interest	$ 3,410	$ 2,814
Stockholders' equity
Preferred stock - $0.01 par value: 10,000,000 shares authorized; zero shares outstanding as of June 30, 2015 and December 31, 2014	0	0
Common stock - $0.01 par value; 150,000,000 shares authorized; 48,232,405 and 48,452,852 shares outstanding as of June 30, 2015 and December 31, 2014, respectively	483	485
Additional paid-in capital	356,047	356,792
Treasury stock at cost: 33,819,848 and 33,599,401 shares as of June 30, 2015 and December 31, 2014, respectively	(535,507)	(527,595)
Accumulated other comprehensive income (loss)	(74,751)	(52,274)
Retained earnings	701,714	677,859
Noncontrolling interest	7,585	7,983
Total stockholders' equity	455,571	463,250
Total liabilities and stockholders' equity	$ 863,205	$ 852,475