Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 60,304	$ 77,316
Accounts receivable, net	283,474	276,432
Prepaids and other current assets	64,180	64,702
Deferred tax assets, net		22,501
Income tax receivable	7,114	4,532
Total current assets	415,072	445,483
Long-term assets
Property, plant and equipment, net	168,289	150,212
Goodwill	114,183	128,705
Deferred tax assets, net	52,082	31,512
Other intangible assets, net	51,215	59,905
Other long-term assets	42,486	36,658
Total long-term assets	428,255	406,992
Total assets	843,327	852,475
Current liabilities
Accounts payable	43,323	37,019
Accrued employee compensation and benefits	71,634	70,069
Other accrued expenses	33,160	34,430
Income taxes payable	9,125	10,141
Deferred revenue	26,184	29,887
Other current liabilities	23,480	17,085
Total current liabilities	206,906	198,631
Long-term liabilities
Line of credit	100,000	100,000
Deferred tax liabilities, net	3,333	4,675
Deferred rent	11,791	8,956
Other long-term liabilities	76,349	74,149
Total long-term liabilities	191,473	187,780
Total liabilities	$ 398,379	$ 386,411
Commitments and contingencies (Note 14)
Mandatorily redeemable noncontrolling interest	$ 4,131	$ 2,814
Stockholders' equity
Common stock - $0.01 par value; 150,000,000 shares authorized; 48,481,323 and 48,452,852 shares outstanding as of December 31, 2015 and December 31, 2014, respectively	485	485
Additional paid-in capital	347,251	356,792
Treasury stock at cost: 33,648,003 and 33,599,401 shares as of September 30, 2015 and December 31, 2014, respectively	(533,744)	(527,595)
Accumulated other comprehensive income (loss)	(101,365)	(52,274)
Retained earnings	720,989	677,859
Noncontrolling interest	7,201	7,983
Total stockholders' equity	440,817	463,250
Total liabilities and stockholders' equity	$ 843,327	$ 852,475