Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 78,237	$ 74,437
Accounts receivable, net	350,962	391,902
Prepaids and other current assets	88,487	63,971
Income tax receivable	8,791	11,099
Total current assets	526,477	541,409
Long-term assets
Property, plant and equipment, net	161,523	163,346
Goodwill	204,633	209,727
Deferred tax assets, net	15,523	12,012
Other intangible assets, net	80,911	93,085
Other long-term assets	65,441	59,157
Total long-term assets	528,031	537,327
Total assets	1,054,508	1,078,736
Current liabilities
Accounts payable	59,447	46,442
Accrued employee compensation and benefits	83,437	84,830
Other accrued expenses	15,963	19,047
Income taxes payable	12,325	7,497
Deferred revenue	44,926	21,650
Other current liabilities	19,320	22,312
Total current liabilities	235,418	201,778
Long-term liabilities
Line of credit	282,000	344,000
Deferred tax liabilities, net	10,371	11,285
Non-current Income Taxes Payable	30,754	47,871
Deferred rent	16,584	15,714
Other long-term liabilities	126,532	95,243
Total long-term liabilities	466,241	514,113
Total liabilities	701,659	715,891
Stockholders' equity
Common stock - $0.01 par value; 150,000,000 shares authorized; 46,194,717 and 45,861,959 shares outstanding as of December 31, 2018 and December 31, 2017, respectively	462	459
Additional paid-in capital	353,932	351,725
Treasury stock at cost: 35,857,536 and 36,190,294 shares as of December 31, 2018 and December 31, 2017, respectively	(610,177)	(615,677)
Accumulated other comprehensive income (loss)	(124,596)	(102,304)
Retained earnings	725,551	721,664
Noncontrolling interest	7,677	6,978
Total stockholders' equity	352,849	362,845
Total liabilities and stockholders' equity	$ 1,054,508	$ 1,078,736