Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 75,517	$ 78,237
Accounts receivable, net	323,823	350,962
Prepaids and other current assets	75,287	61,808
Income tax receivable	37,855	35,470
Total current assets	512,482	526,477
Long-term assets
Property, plant and equipment, net	162,643	161,523
Operating lease assets	137,260
Goodwill	205,758	204,633
Deferred Tax Assets, Net	15,058	15,523
Other intangible assets, net	75,589	80,911
Other long-term assets	70,551	65,441
Total long-term assets	666,859	528,031
Total assets	1,179,341	1,054,508
Current liabilities
Accounts payable	56,625	59,447
Accrued employee compensation and benefits	101,985	83,437
Other accrued expenses	62,740	15,963
Income taxes payable	10,507	12,325
Deferred revenue	39,716	44,926
Current operating lease liabilities	38,719
Other current liabilities	12,577	19,320
Total current liabilities	322,869	235,418
Long-term liabilities
Line of credit	228,000	282,000
Deferred tax liabilities, net	11,232	10,371
Non-current Income Taxes Payable	28,253	30,754
Deferred rent		16,584
Non-current operating lease liabilities	118,350
Other long-term liabilities	79,988	126,532
Total long-term liabilities	465,823	466,241
Total liabilities	788,692	701,659
Stockholders' equity
Common stock - $0.01 par value; 150,000,000 shares authorized; 46,386,727 and 46,194,717 shares outstanding as of June 30, 2019 and December 31, 2018, respectively	464	462
Additional paid-in capital	354,068	353,932
Treasury stock at cost: 35,665,526 and 35,857,536 shares as of June 30, 2019 and December 31, 2018, respectively	(607,004)	(610,177)
Accumulated other comprehensive income (loss)	(110,686)	(124,596)
Retained earnings	741,728	725,551
Noncontrolling interest	12,079	7,677
Total stockholders' equity	390,649	352,849
Total liabilities and stockholders' equity	$ 1,179,341	$ 1,054,508