Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Current assets
Cash and cash equivalents	$ 87,612	$ 158,017
Accounts receivable, net	266,846	236,099
Prepaids and other current assets	67,803	52,332
Deferred tax assets, net	9,939	11,905
Income tax receivable	7,296	11,198
Total current assets	439,496	469,551
Long-term assets
Property, plant and equipment, net	147,905	126,719
Goodwill	128,830	102,743
Contract acquisition costs, net	1,381	1,642
Deferred tax assets, net	42,868	42,791
Other intangible assets, net	61,831	54,812
Other long-term assets	38,998	44,084
Total long-term assets	421,813	372,791
Total assets	861,309	842,342
Current liabilities
Accounts payable	34,154	32,031
Accrued employee compensation and benefits	68,421	80,130
Other accrued expenses	34,212	31,659
Income taxes payable	6,224	6,066
Deferred tax liabilities, net	34	590
Deferred revenue	30,187	28,799
Other current liabilities	15,666	11,512
Total current liabilities	188,898	190,787
Long-term liabilities
Line of credit	115,000	100,000
Deferred tax liabilities, net	2,551	2,281
Deferred rent	9,080	9,635
Other long-term liabilities	75,297	63,648
Total long-term liabilities	201,928	175,564
Total liabilities	390,826	366,351
Commitments and contingencies (Note 10)
Mandatorily redeemable noncontrolling interest	2,790	2,509
Stockholders' equity
Preferred stock - $0.01 par value: 10,000,000 shares authorized; zero shares outstanding as of September 30, 2014 and December 31, 2013	0	0
Common stock - $0.01 par value; 150,000,000 shares authorized; 49,805,900 and 50,352,881 shares outstanding as of September 30, 2014 and December 31, 2013, respectively	489	503
Additional paid-in capital	355,824	356,381
Treasury stock at cost: 33,246,353 and 31,699,372 shares as of September 30, 2014 and December 31, 2013, respectively	(518,745)	(477,399)
Accumulated other comprehensive income (loss)	(33,750)	(20,586)
Retained earnings	655,720	606,502
Noncontrolling interest	8,155	8,081
Total stockholders' equity	467,693	473,482
Total liabilities and stockholders' equity	$ 861,309	$ 842,342