Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 6,839	$ 10,935
Accounts receivable, net	96,734	113,928
Prepaid expenses	3,519	2,476
Other current assets	7,028	4,679
Total current assets	114,120	132,018
Property and equipment, net	8,369	7,966
Goodwill	255,189	236,130
Intangible assets, net	52,218	46,105
Other non-current assets	4,017	3,823
Total assets	433,913	426,042
Current liabilities:
Accounts payable	11,160	22,035
Other current liabilities	26,851	33,028
Total current liabilities	38,011	55,063
Long-term debt	60,000	54,000
Other non-current liabilities	10,419	12,251
Total liabilities	108,430	121,314
Stockholders' equity:
Common stock (par value $.001 per share; 50,000,000 shares authorized and 44,402,827 shares issued and 33,766,673 shares outstanding as of June 30, 2015; 43,174,676 shares issued and 32,854,802 shares outstanding as of December 31, 2014)	44	43
Additional paid-in capital	353,759	334,645
Accumulated other comprehensive loss	(803)	(651)
Treasury stock, at cost (10,636,154 shares as of June 30, 2015; 10,319,874 shares as of December 31, 2014)	(101,624)	(95,353)
Retained earnings	74,107	66,044
Total stockholders' equity	325,483	304,728
Total liabilities and stockholders' equity	$ 433,913	$ 426,042

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).

Name:	us-gaap_AccountsPayableCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.