CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Current assets
Cash and cash equivalents	$ 267,471	$ 177,889
Investments	1,220	37,961
Accounts receivable (less allowance for credit losses of $9,366 and $6,878 at September 30, 2020 and December 31, 2019, respectively)	258,940	244,519
Inventories	70,218	74,606
Other current assets	37,607	46,974
Total current assets	635,456	581,949
Property and equipment, net	104,900	106,410
Operating lease right-of-use assets	50,873	45,691
Non-current assets
Goodwill	206,782	195,652
Intangibles, net	155,398	153,562
Other non-current assets	12,036	16,215
Total assets	1,165,445	1,099,479
Current liabilities
Current maturities of long-term debt	24,156	24,164
Current maturities of operating lease obligations	17,875	15,459
Current maturities of finance lease obligations	2,268	2,747
Accounts payable	86,898	98,871
Accrued compensation	43,310	33,636
Other current liabilities	47,734	39,272
Total current liabilities	222,241	214,149
Long-term debt	544,276	545,031
Operating lease obligations	32,431	29,785
Finance lease obligations	2,747	3,597
Deferred income taxes	3,704	9,175
Other long-term liabilities	55,859	47,711
Total liabilities	861,258	849,448
Commitments and contingencies (Note 15)
Stockholders' equity
Preferred Stock; $0.01 par value: 5,000,000 authorized and 0 shares issued and outstanding at September 30, 2020 and December 31, 2019, respectively
Common stock; $0.01 par value: 100,000,000 authorized, 33,127,310 and 32,871,504 issued and 29,800,535 and 30,016,340 shares outstanding at September 30, 2020 and December 31, 2019, respectively	331	329
Additional paid in capital	197,486	190,230
Retained earnings	241,583	173,371
Treasury stock; at cost: 3,326,775 and 2,855,164 shares at September 30, 2020 and December 31, 2019, respectively	(123,488)	(106,756)
Accumulated other comprehensive loss	(11,725)	(7,143)
Total stockholders' equity	304,187	250,031
Total liabilities and stockholders' equity	$ 1,165,445	$ 1,099,479