Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 86,170	$ 77,316
Accounts receivable, net	258,231	276,432
Prepaids and other current assets	75,798	64,702
Deferred tax assets, net	27,175	22,501
Income tax receivable	3,015	4,532
Total current assets	450,389	445,483
Long-term assets
Property, plant and equipment, net	165,795	150,212
Goodwill	118,784	128,705
Deferred tax assets, net	24,159	31,512
Other intangible assets, net	53,564	59,905
Other long-term assets	45,524	36,658
Total long-term assets	407,826	406,992
Total assets	858,215	852,475
Current liabilities
Accounts payable	46,358	37,019
Accrued employee compensation and benefits	71,937	70,069
Other accrued expenses	40,662	34,430
Income taxes payable	7,247	10,141
Deferred tax liabilities, net	358
Deferred revenue	30,183	29,887
Other current liabilities	27,296	17,085
Total current liabilities	224,041	198,631
Long-term liabilities
Line of credit	115,000	100,000
Deferred tax liabilities, net	2,351	4,675
Deferred rent	10,023	8,956
Other long-term liabilities	81,011	74,149
Total long-term liabilities	208,385	187,780
Total liabilities	$ 432,426	$ 386,411
Commitments and contingencies (Note 10)
Mandatorily redeemable noncontrolling interest	$ 3,920	$ 2,814
Stockholders' equity
Common stock - $0.01 par value; 150,000,000 shares authorized; 48,404,250 and 48,452,852 shares outstanding as of September 30, 2015 and December 31, 2014, respectively	485	485
Additional paid-in capital	347,445	356,792
Treasury stock at cost: 33,648,003 and 33,599,401 shares as of September 30, 2015 and December 31, 2014, respectively	(534,680)	(527,595)
Accumulated other comprehensive income (loss)	(102,902)	(52,274)
Retained earnings	703,898	677,859
Noncontrolling interest	7,623	7,983
Total stockholders' equity	421,869	463,250
Total liabilities and stockholders' equity	$ 858,215	$ 852,475