CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 79,290	$ 23,275
Restricted cash	0	7
Accounts receivable and unbilled, net (includes $1.1 million and $3.8 million with related parties at September 30, 2019 and December 31, 2018, respectively)	140,189	133,449
Prepaid expenses and other current assets	30,918	21,383
Total current assets	250,397	178,114
Property and equipment, net	43,715	52,255
Operating lease right-of-use assets	52,479	0
Goodwill	662,427	660,981
Intangible assets, net	57,345	69,179
Deferred income taxes	293	713
Other assets	5,673	6,691
Total assets	1,072,329	967,933
Current liabilities:
Accounts payable (includes $0.1 million and $0.3 million with related parties at September 30, 2019 and December 31, 2018, respectively)	20,684	16,737
Accrued expenses	102,535	87,493
Advanced billings (includes $1.3 million and $0.4 million with related parties at September 30, 2019 and December 31, 2018, respectively)	169,529	147,935
Other current liabilities	21,644	4,861
Total current liabilities	314,392	257,026
Long-term debt, net, less current portion	0	79,721
Operating lease liabilities	46,022	0
Deemed landlord liability, less current portion	0	24,484
Deferred income tax liability	5,578	439
Other long-term liabilities	14,330	16,560
Total liabilities	380,322	378,230
Commitments and contingencies (see Note 12)
Shareholders’ equity:
Preferred stock - $0.01 par-value; 5,000,000 shares authorized; no shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	0	0
Common stock - $0.01 par-value; 250,000,000 shares authorized at September 30, 2019 and December 31, 2018, respectively; 36,011,725 and 35,665,910 shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	360	356
Treasury stock - 200,000 shares at September 30, 2019 and December 31, 2018, respectively	(6,030)	(6,030)
Additional paid-in capital	663,044	639,381
Retained earnings (accumulated deficit)	38,296	(41,487)
Accumulated other comprehensive loss	(3,663)	(2,517)
Total shareholders’ equity	692,007	589,703
Total liabilities and shareholders’ equity	$ 1,072,329	$ 967,933

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

Carrying value as of the balance sheet date of obligations incurred and payable, pertaining to costs that are statutory in nature, are incurred on contractual obligations, or accumulate over time and for which invoices have not yet been received or will not be rendered. Examples include taxes, interest, rent and utilities. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).