Financing Debt - Additional Information (Detail) (USD $)			1 Months Ended	3 Months Ended			1 Months Ended		1 Months Ended
	Mar. 31, 2014 UNIK	Dec. 31, 2013 UNIK	Jan. 30, 2013 Senior Notes	Mar. 31, 2014 Senior Notes	Mar. 31, 2014 Semi Annual Payment, First Payment Senior Notes	Mar. 31, 2014 Semi Annual Payment, Second Payment Senior Notes	Jan. 18, 2013 Two Thousand And Thirteen Agreements [Member] Term Loans Facility	May 23, 2011 Two Thousand And Thirteen Agreements [Member] Term Loans Facility	Jan. 18, 2013 Two Thousand And Thirteen Agreements [Member] Revolving Credit Facility	Jan. 30, 2013 Two Thousand And Thirteen Agreements [Member] Revolving Credit Facility	May 23, 2011 Two Thousand And Thirteen Agreements [Member] Revolving Credit Facility	Jan. 18, 2013 Two Thousand And Thirteen Agreements [Member] Revolving Credit Facility Letter of Credit	Jan. 18, 2013 Amended And Restated Credit Agreement [Member] Term Loans Facility	Jan. 18, 2013 Amended And Restated Credit Agreement [Member] Revolving Credit Facility
Debt Instrument [Line Items]
Debt Instrument First Interest Payment Date				Aug. 01, 2013
Credit agreement loan, term							5 years		5 years
Credit agreement loan, maximum							$ 300,000,000	$ 185,000,000	$ 800,000,000	$ 700,000,000	$ 700,000,000	$ 150,000,000	$ 300,000,000	$ 800,000,000
Debt instrument, aggregate principal amount			400,000,000
Debt instrument, interest rate			4.75%
Debt Instrument Interest Rate Payment Day And Month					Feb. 01, 2013	Aug. 01, 2013
Debt Instrument Issuance Price Percent Of Total			100.00%
Debt instrument, maturity date				Feb. 01, 2023
Acquisition of debt unpaid	$ 11,161,000	$ 7,278,000