Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 66,475	$ 55,264
Accounts receivable, net	272,827	300,808
Prepaids and other current assets	64,002	59,905
Income tax receivable	7,670	7,035
Total assets held for sale	12,967	10,715
Total current assets	423,941	433,727
Long-term assets
Property, plant and equipment, net	151,841	151,037
Goodwill	129,765	129,648
Deferred tax assets, net	47,065	53,585
Other intangible assets, net	29,656	30,787
Other long-term assets	57,883	47,520
Total long-term assets	416,210	412,577
Total assets	840,151	846,304
Current liabilities
Accounts payable	34,232	38,197
Accrued employee compensation and benefits	78,689	66,133
Other accrued expenses	25,078	14,830
Income taxes payable	10,047	7,040
Deferred revenue	27,215	23,318
Other current liabilities	25,006	29,154
Total liabilities held for sale	2,446	1,357
Total current liabilities	202,713	180,029
Long-term liabilities
Line of credit	182,000	217,300
Deferred tax liabilities, net	301	160
Deferred rent	15,625	15,256
Other long-term liabilities	64,240	71,664
Total long-term liabilities	262,166	304,380
Total liabilities	464,879	484,409
Commitments and contingencies (Note 10)
Stockholders' equity
Common stock - $0.01 par value; 150,000,000 shares authorized; 45,768,986 and 46,113,693 shares outstanding as of March 31, 2017 and December 31, 2016, respectively	458	462
Additional paid-in capital	349,688	348,739
Treasury stock at cost: 36,283,267 and 35,938,560 shares as of March 31, 2017 and December 31, 2016, respectively	(614,233)	(603,262)
Accumulated other comprehensive income (loss)	(112,515)	(126,964)
Retained earnings	745,115	735,939
Noncontrolling interest	6,759	6,981
Total stockholders' equity	375,272	361,895
Total liabilities and stockholders' equity	$ 840,151	$ 846,304