Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 50,032	$ 70,728
Accounts receivable, net	137,043	129,118
Prepaid expenses	6,187	4,647
Other current assets	4,630	7,404
Total current assets	197,892	211,897
Property and equipment, net	12,038	12,170
Operating lease right-of-use assets	40,186	27,748
Goodwill	419,029	335,564
Intangible assets, net	67,347	37,953
Other non-current assets	17,802	15,160
Total assets	754,294	640,492
Current liabilities:
Accounts payable	16,519	23,081
Other current liabilities	84,179	61,503
Total current liabilities	100,698	84,584
Long-term debt, net	187,737	124,664
Operating lease liabilities	30,813	19,649
Other non-current liabilities	48,621	30,580
Total liabilities	367,869	259,477
Stockholders’ equity:
Preferred stock (par value $0.001 per share; 8,000,000 authorized; no shares issued or outstanding as of September 30, 2020 and December 31, 2019)	0	0
Common stock (par value $0.001 per share; 100,000,000 authorized; 49,996,293 shares issued and 32,041,550 shares outstanding as of September 30, 2020; 49,272,243 shares issued and 31,686,991 shares outstanding as of December 31, 2019)	50	49
Additional paid-in capital	457,528	455,465
Accumulated other comprehensive loss	(4,776)	(2,650)
Treasury stock, at cost (17,954,743 shares as of September 30, 2020; 17,585,252 shares as of December 31, 2019)	(277,597)	(261,624)
Retained earnings	211,220	189,775
Total stockholders’ equity	386,425	381,015
Total liabilities and stockholders’ equity	$ 754,294	$ 640,492