Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 29,301	$ 70,728
Accounts receivable, net	126,728	129,118
Prepaid expenses	6,493	4,647
Other current assets	6,600	7,404
Total current assets	169,122	211,897
Property and equipment, net	12,300	12,170
Operating lease right-of-use assets	30,562	27,748
Goodwill	361,537	335,564
Intangible assets, net	49,666	37,953
Other non-current assets	14,471	15,160
Total assets	637,658	640,492
Current liabilities:
Accounts payable	15,498	23,081
Other current liabilities	49,864	61,503
Total current liabilities	65,362	84,584
Long-term debt, net	125,847	124,664
Operating lease liabilities	21,855	19,649
Other non-current liabilities	31,070	30,580
Total liabilities	244,134	259,477
Stockholders’ equity:
Preferred stock (par value $0.001 per share; 8,000,000 authorized; no shares issued or outstanding as of March 31, 2020 and December 31, 2019)	0	0
Common stock (par value $0.001 per share; 100,000,000 authorized; 49,759,929 shares issued and 32,061,167 shares outstanding as of March 31, 2020; 49,272,243 shares issued and 31,686,991 shares outstanding as of December 31, 2019)	50	49
Additional paid-in capital	465,123	455,465
Accumulated other comprehensive loss	(3,624)	(2,650)
Treasury stock, at cost (17,698,762 shares as of March 31, 2020; 17,585,252 shares as of December 31, 2019)	(266,459)	(261,624)
Retained earnings	198,434	189,775
Total stockholders’ equity	393,524	381,015
Total liabilities and stockholders’ equity	$ 637,658	$ 640,492