CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 93,474	$ 120,286
Accounts receivable, net	416,412	404,911
Contract assets	359,370	344,806
Prepaid expenses and other current assets	47,409	42,704
Total current assets	916,665	912,707
Property and equipment, net	363,993	375,888
Operating lease assets	253,117	242,385
Deferred tax assets	1,090	1,100
Intangible assets, net	67,460	69,829
Goodwill	215,103	215,103
Other long-term assets	17,675	13,453
Total assets	1,835,103	1,830,465
Current liabilities:
Accounts payable	258,962	235,972
Contract liabilities	176,847	192,397
Accrued liabilities	192,648	183,501
Dividends payable	2,895	2,919
Current portion of long-term debt	52,430	55,659
Total current liabilities	683,782	670,448
Long-term debt, net of current portion	290,749	295,642
Noncurrent operating lease liabilities, net of current portion	176,546	171,225
Deferred tax liabilities	17,820	17,819
Other long-term liabilities	50,762	45,801
Total liabilities	1,219,659	1,200,935
Commitments and contingencies (See Note 16)
Stockholders' equity
Common stock-$.0001 par value; 90,000,000 shares authorized; 48,254,575 and 48,665,138 issued and outstanding at March 31, 2020 and December 31, 2019, respectively	5	5
Additional paid-in capital	91,414	97,130
Retained earnings	524,655	531,291
Accumulated other comprehensive (loss) income	(1,661)	76
Noncontrolling interest	1,031	1,028
Total stockholders' equity	615,444	629,530
Total liabilities and stockholders' equity	$ 1,835,103	$ 1,830,465