Debt (Details) (Amended And Restated Credit Agreement [Member], USD $) In Millions, unless otherwise specified	6 Months Ended									0 Months Ended		6 Months Ended
	Jun. 30, 2014 item	Dec. 31, 2013	Jun. 30, 2016 Scenario Forecast [Member]	Jun. 30, 2015 Scenario Forecast [Member]	Jun. 30, 2014 Line Of Credit [Member]	Dec. 31, 2013 Line Of Credit [Member]	Jun. 12, 2013 Line Of Credit [Member]	Jun. 12, 2013 Letter Of Credit [Member]	Jun. 12, 2013 Swingline Loan [Member]	Jun. 12, 2013 Term Loan A Facility [Member] item	Jun. 12, 2013 Incremental Facility [Member]	Jun. 30, 2014 Revolving Loans And Term Loans [Member] Base Rate [Member] item	Jun. 30, 2014 Revolving Loans And Term Loans [Member] Base Rate [Member] Minimum [Member]	Jun. 30, 2014 Revolving Loans And Term Loans [Member] Base Rate [Member] Maximum [Member]	Jun. 30, 2014 Revolving Loans And Term Loans [Member] Prime Rate [Member]	Jun. 30, 2014 Revolving Loans And Term Loans [Member] Federal Funds Rate [Member]	Jun. 30, 2014 Revolving Loans And Term Loans [Member] London Interbank Offered Rate L I B O R [Member] item	Jun. 30, 2014 Revolving Loans And Term Loans [Member] London Interbank Offered Rate L I B O R [Member] Minimum [Member]	Jun. 30, 2014 Revolving Loans And Term Loans [Member] London Interbank Offered Rate L I B O R [Member] Maximum [Member]
Debt
Number of equal consecutive quarterly principal installments										20
Quarterly principal installments										$ 5.0
Maximum borrowing facility							200	25	10	225	75
Variable interest rate base (as a percent)													Alternate Base Rate	Alternate Base Rate	Prime Rate	Federal Funds Rate	Adjusted LIBOR rate for a one-month period	Adjusted LIBOR Rate (based on one, two, three or six-month interest periods)	Adjusted LIBOR Rate (based on one, two, three or six-month interest periods)
Percentage points added to the reference rate													0.25%	1.25%		0.50%	1.00%	1.25%	2.25%
Number of fiscal quarters used in calculating the consolidated leverage ratio	4											4					4
Number of fiscal quarters used in calculating the consolidated interest coverage ratio	4
Percentage of the capital stock of Advent's or a guarantor's first-tier foreign subsidiaries serving as collateral on the obligations	66.00%
Leverage ratio, Maximum, Covenant	3.75		3.25	3.50
Leverage ratio, Actual	2.20
Interest coverage ratio, Minimum, Covenant	2.5
Interest coverage ratio, Actual	13.6
Default interest rate (as a percent)	2.00%
Debt outstanding	$ 280.0	$ 305.0			$ 75.0	$ 90.0