FINANCING ARRANGEMENTS (Details) (USD $)	9 Months Ended				0 Months Ended		3 Months Ended		9 Months Ended				12 Months Ended	9 Months Ended			12 Months Ended	9 Months Ended			0 Months Ended					0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 Liberty and Provide Commerce Forecast Acquisition	Sep. 30, 2014 Amended and Restated Credit Agreement	Jul. 17, 2013 Amended and Restated Credit Agreement Maximum	Jul. 17, 2013 Amended and Restated Credit Agreement Revolving credit facility	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility	Sep. 30, 2013 Amended and Restated Credit Agreement Revolving credit facility	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility Maximum	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility Minimum	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility Base rate	Dec. 31, 2013 Amended and Restated Credit Agreement Revolving credit facility Base rate	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility Base rate Maximum	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility Base rate Minimum	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility LIBOR	Dec. 31, 2013 Amended and Restated Credit Agreement Revolving credit facility LIBOR	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility LIBOR Maximum	Sep. 30, 2014 Amended and Restated Credit Agreement Revolving credit facility LIBOR Minimum	Sep. 10, 2011 2011 Credit Agreement	Sep. 10, 2011 2011 Credit Agreement Revolving credit facility	Sep. 10, 2011 2011 Credit Agreement Revolving credit facility Base rate	Sep. 10, 2011 2011 Credit Agreement Revolving credit facility LIBOR	Sep. 30, 2014 Term loan Amended and Restated Credit Agreement	Sep. 19, 2014 Term loan Amended and Restated Credit Agreement	Sep. 10, 2011 Term loan 2011 Credit Agreement	Sep. 10, 2011 Term loan 2011 Credit Agreement Base rate	Sep. 10, 2011 Term loan 2011 Credit Agreement LIBOR
Financing arrangements
Maximum borrowing capacity						$ 350,000,000															$ 50,000,000
Term of debt instrument						5 years															5 years					7 years
Amount borrowed under the Revolving Credit Facility						220,000,000
Repayments of previously outstanding credit facilities in full and fees and expenses						19,000,000
Aggregate principal amount of term loan																				315,000,000					200,000,000	265,000,000
Percentage of outstanding capital stock of foreign subsidiaries that is pledged as collateral for borrowings					66.00%
Reference rate for variable interest rate												base rate	base rate			LIBOR	LIBOR					base rate	LIBOR				base rate	LIBOR
Percentage points added to the reference rate														1.50%	0.50%			2.50%	1.50%			2.50%	3.50%				2.50%	3.50%
Percentage points initially added to the reference rate													0.75%				1.75%
Interest rate (as a percent)							1.90%		1.90%															1.98%
Commitment fee (as a percent)									0.25%	0.40%	0.20%										0.45%
Future minimum principal payments, excluding required prepayments based on excess cash flows
2015				20,000,000
2016				20,000,000
2017				20,000,000
2018				20,000,000
2019				140,000,000
Total				220,000,000
Letters of credit outstanding							1,300,000		1,300,000
Remaining borrowing capacity							328,700,000		328,700,000
Available borrowing capacity designated to fund the Acquisition Advance			121,000,000
Floor rate (as a percent)																										1.25%
Losses on extinguishment of debt	$ 101,000	$ 2,348,000					$ 100,000	$ 2,300,000