ACQUISITIONS (Estimated Fair Values) (Details) (USD $)	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 05, 2014	Apr. 30, 2014	Jun. 06, 2014
Business Acquisition [Line Items]
Goodwill	$ 57,417,000	$ 22,268,000	$ 22,698,000
Netsoft
Business Acquisition [Line Items]
Cash and cash equivalents	0			0
Trade receivables and other current assets	788,000			788,000
Property and equipment and other long-term assets	52,000			52,000
Deferred tax asset	0			351,000
Acquired intangible assets	1,700,000			1,700,000
Goodwill	2,749,000			2,776,000
Total assets acquired	5,289,000			5,667,000
Accounts payable and accrued expenses	69,000			69,000
Deferred revenue	0			0
Due to employees	0			0
Deferred tax liability	0			0
Total liabilities assumed	69,000			69,000
Net assets acquired	5,220,000			5,598,000
Jointech
Business Acquisition [Line Items]
Cash and cash equivalents	871,000				871,000
Trade receivables and other current assets	784,000				784,000
Property and equipment and other long-term assets	338,000				338,000
Deferred tax asset	0				0
Acquired intangible assets	22,485,000				25,744,000
Goodwill	17,404,000				11,033,000
Total assets acquired	41,882,000				38,770,000
Accounts payable and accrued expenses	728,000				728,000
Deferred revenue	0				0
Due to employees	1,254,000				1,254,000
Deferred tax liability	3,112,000				0
Total liabilities assumed	5,094,000				1,982,000
Net assets acquired	36,788,000				36,788,000
GGA
Business Acquisition [Line Items]
Cash and cash equivalents	0					0
Trade receivables and other current assets	5,471,000					5,157,000
Property and equipment and other long-term assets	444,000					444,000
Deferred tax asset	0					4,463,000
Acquired intangible assets	10,959,000					10,959,000
Goodwill	12,115,000					6,496,000
Total assets acquired	28,989,000					27,519,000
Accounts payable and accrued expenses	2,593,000					2,593,000
Deferred revenue	104,000					0
Due to employees	0					0
Deferred tax liability	0					0
Total liabilities assumed	2,697,000					2,593,000
Net assets acquired	26,292,000					24,926,000
Great Fridays
Business Acquisition [Line Items]
Cash and cash equivalents	259,000
Trade receivables and other current assets	1,825,000
Property and equipment and other long-term assets	262,000
Deferred tax asset	0
Acquired intangible assets	5,747,000
Goodwill	6,947,000
Total assets acquired	15,040,000
Accounts payable and accrued expenses	872,000
Deferred revenue	317,000
Due to employees	624,000
Deferred tax liability	1,200,000
Total liabilities assumed	3,013,000
Net assets acquired	12,027,000
As Originally Reported
Business Acquisition [Line Items]
Cash and cash equivalents	1,130,000
Trade receivables and other current assets	8,554,000
Property and equipment and other long-term assets	1,096,000
Deferred tax asset	4,814,000
Acquired intangible assets	44,150,000
Goodwill	27,252,000
Total assets acquired	86,996,000
Accounts payable and accrued expenses	4,262,000
Deferred revenue	317,000
Due to employees	1,878,000
Deferred tax liability	1,200,000
Total liabilities assumed	7,657,000
Net assets acquired	79,339,000
Total
Business Acquisition [Line Items]
Cash and cash equivalents	1,130,000
Trade receivables and other current assets	8,868,000
Property and equipment and other long-term assets	1,096,000
Deferred tax asset	0
Acquired intangible assets	40,891,000
Goodwill	39,215,000
Total assets acquired	91,200,000
Accounts payable and accrued expenses	4,262,000
Deferred revenue	421,000
Due to employees	1,878,000
Deferred tax liability	4,312,000
Total liabilities assumed	10,873,000
Net assets acquired	$ 80,327,000