CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 120,286	$ 151,063
Accounts receivable, net	404,911	372,695
Contract assets	344,806	364,245
Prepaid expenses and other current assets	42,704	36,444
Total current assets	912,707	924,447
Property and equipment, net	375,888	375,884
Operating lease assets	242,385
Deferred tax assets	1,100	1,457
Intangible assets, net	69,829	81,198
Goodwill	215,103	206,159
Other long-term assets	13,453	5,002
Total assets	1,830,465	1,594,147
Current liabilities:
Accounts payable	235,972	249,217
Contract liabilities	192,397	189,539
Accrued liabilities	183,501	117,527
Dividends payable	2,919	3,043
Current portion of long-term debt	55,659	62,488
Total current liabilities	670,448	621,814
Long-term debt, net of current portion	295,642	305,669
Noncurrent operating lease liabilities, net of current portion	171,225
Deferred tax liabilities	17,819	8,166
Other long-term liabilities	45,801	51,515
Total liabilities	1,200,935	987,164
Commitments and contingencies (See Note 13)
Stockholders' equity
Common stock-$.0001 par value; 90,000,000 shares authorized; 48,665,138 and 51,715,518 issued and outstanding at December 31, 2019 and 2018, respectively	5	5
Additional paid-in capital	97,130	144,048
Retained earnings	531,291	461,075
Accumulated other comprehensive income (loss)	76	(908)
Noncontrolling interest	1,028	2,763
Total stockholders' equity	629,530	606,983
Total liabilities and stockholders' equity	$ 1,830,465	$ 1,594,147