CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 43,837	$ 151,063
Accounts receivable, net	551,543	372,695
Contract assets	331,910	364,245
Prepaid expenses and other current assets	34,222	36,444
Total current assets	961,512	924,447
Property and equipment, net	379,739	375,884
Operating lease assets	228,100
Deferred tax assets	888	1,457
Intangible assets, net	72,581	81,198
Goodwill	215,103	206,159
Other long-term assets	11,046	5,002
Total assets	1,868,969	1,594,147
Current liabilities:
Accounts payable	219,792	249,217
Contract liabilities	189,664	189,539
Accrued liabilities	219,472	117,527
Dividends payable	3,059	3,043
Current portion of long-term debt	60,104	62,488
Total current liabilities	692,091	621,814
Long-term debt, net of current portion	307,397	305,669
Noncurrent operating lease liabilities, net of current portion	162,418
Deferred tax liabilities	3,611	8,166
Other long-term liabilities	49,289	51,515
Total liabilities	1,214,806	987,164
Commitments and contingencies (See Note 17)
Stockholders' equity
Common stock-$.0001 par value; 90,000,000 shares authorized; 50,982,098 and 51,715,518 issued and outstanding at September 30, 2019 and December 31, 2018	5	5
Additional paid-in capital	146,765	144,048
Retained earnings	507,269	461,075
Accumulated other comprehensive loss	(338)	(908)
Noncontrolling interest	462	2,763
Total stockholders' equity	654,163	606,983
Total liabilities and stockholders' equity	$ 1,868,969	$ 1,594,147