Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets
Cash and cash equivalents	$ 81,594	$ 74,437
Accounts receivable, net	344,249	385,751
Prepaids and other current assets	71,840	63,668
Income tax receivable	12,569	11,099
Assets held for sale	7,412	7,835
Total current assets	517,664	542,790
Long-term assets
Property, plant and equipment, net	157,215	163,297
Goodwill	205,632	206,694
Deferred tax assets, net	16,476	12,012
Other intangible assets, net	88,707	92,086
Other long-term assets	49,168	61,857
Total long-term assets	517,198	535,946
Total assets	1,034,862	1,078,736
Current liabilities
Accounts payable	39,472	46,029
Accrued employee compensation and benefits	85,004	83,997
Other accrued expenses	29,442	18,993
Income taxes payable	18,318	7,497
Deferred revenue	28,675	21,628
Other current liabilities	22,535	22,312
Liabilities held for sale	1,481	1,322
Total current liabilities	224,927	201,778
Long-term liabilities
Line of credit	302,500	344,000
Deferred tax liabilities, net	11,458	11,285
Non-current Income Taxes Payable	38,956	47,871
Deferred rent	14,677	15,714
Other long-term liabilities	97,121	95,243
Total long-term liabilities	464,712	514,113
Total liabilities	689,639	715,891
Stockholders' equity
Common stock - $0.01 par value; 150,000,000 shares authorized; 45,979,290 and 45,861,959 shares outstanding as of March 31, 2018 and December 31, 2017, respectively	460	459
Additional paid-in capital	351,672	351,725
Treasury stock at cost: 36,072,963 and 36,190,294 shares as of March 31, 2018 and December 31, 2017, respectively	(613,738)	(615,677)
Accumulated other comprehensive income (loss)	(107,903)	(102,304)
Retained earnings	707,257	721,664
Noncontrolling interest	7,475	6,978
Total stockholders' equity	345,223	362,845
Total liabilities and stockholders' equity	$ 1,034,862	$ 1,078,736