CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 155,670	$ 120,286
Accounts receivable, net	468,949	404,911
Contract assets	376,733	344,806
Prepaid expenses and other current assets	45,943	42,704
Total current assets	1,047,295	912,707
Property and equipment, net	368,086	375,888
Operating lease assets	240,072	242,385
Deferred tax assets	1,116	1,100
Intangible assets, net	65,146	69,829
Goodwill	215,103	215,103
Other long-term assets	16,736	13,453
Total assets	1,953,554	1,830,465
Current liabilities:
Accounts payable	256,980	235,972
Contract liabilities	223,077	192,397
Accrued liabilities	222,472	183,501
Dividends payable	2,893	2,919
Current portion of long-term debt	51,913	55,659
Total current liabilities	757,335	670,448
Long-term debt, net of current portion	300,899	295,642
Noncurrent operating lease liabilities, net of current portion	163,947	171,225
Deferred tax liabilities	17,820	17,819
Other long-term liabilities	68,649	45,801
Total liabilities	1,308,650	1,200,935
Commitments and contingencies (See Note 16)
Stockholders' equity
Common stock-$.0001 par value; 90,000,000 shares authorized; 48,220,811 and 48,665,138 issued and outstanding at June 30, 2020 and December 31, 2019, respectively	5	5
Additional paid-in capital	91,257	97,130
Retained earnings	554,717	531,291
Accumulated other comprehensive (loss) income	(1,109)	76
Noncontrolling interest	34	1,028
Total stockholders' equity	644,904	629,530
Total liabilities and stockholders' equity	$ 1,953,554	$ 1,830,465