Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 23,620	$ 5,057
Accounts receivable, net of allowance of $5,494 and $3,542, respectively	101,813	75,342
Inventory, net of allowance of $76 and $152, respectively	1,475	1,470
Deferred customer acquisition costs, current portion	13,834	11,755
Prepaid expenses	22,338	26,496
Other current assets	9,988	7,634
Total current assets	173,068	127,754
Property and equipment, net of accumulated depreciation of $109,646 and $104,999, respectively	48,371	49,262
Operating Lease, Right-of-Use Asset	50,847	0
Goodwill	602,970	598,499
Software, net of accumulated amortization of $102,133 and $100,870, respectively	40,300	17,430
Capitalized Contract Cost, Net, Noncurrent	55,148	37,881
Restricted cash	2,015	2,047
Intangible assets, net of accumulated amortization of $221,182 and $162,788, respectively	249,905	299,911
Deferred tax assets	108,347	102,560
Other assets	33,729	24,144
Total assets	1,364,700	1,259,488
Current liabilities:
Accounts payable	42,366	53,262
Accrued expenses	137,589	87,370
Deferred revenue, current portion	59,464	53,447
Current portion of notes payable	0	10,000
Total current liabilities	251,896	204,079
Indebtedness under revolving credit facility	220,500	425,000
Long-term Debt	0	84,228
Other liabilities	2,862	10,413
Total liabilities	797,638	723,720
Commitments and Contingencies (Note 15)	0	0
Stockholders’ Equity
Common stock, par value $0.001 per share; 596,950 shares authorized at December 31, 2019 and 2018; 315,808 and 309,736 shares issued at December 31, 2019 and 2018, respectively; 242,849 and 239,743 shares outstanding at December 31, 2019 and 2018, respectively	316	310
Additional paid-in capital	1,494,469	1,415,682
Accumulated deficit	(631,009)	(611,985)
Treasury stock, at cost, 72,959 shares at December 31, 2019 and 69,993 shares at December 31, 2018	(306,043)	(275,009)
Accumulated other comprehensive income	9,329	6,770
Total stockholders’ equity	567,062	535,768
Total liabilities and stockholders’ equity	1,364,700	1,259,488
Convertible Notes Payable	276,658	0
Operating Lease, Liability, Noncurrent	45,722	0
Capital Lease Obligations, Current	$ 12,477	$ 0