Debt - Additional Information (Detail) (USD $)					9 Months Ended		9 Months Ended			9 Months Ended							9 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013 Domestic Accounts Receivable Asset Securitization Program [Member]	Dec. 31, 2012 Domestic Accounts Receivable Asset Securitization Program [Member]	Sep. 30, 2013 International Accounts Receivable Sales Programs [Member]	Dec. 31, 2012 International Accounts Receivable Sales Programs [Member]	Sep. 30, 2013 6.50% Convertible Senior Notes, Net of Unamortized Discounts [Member]	Dec. 31, 2012 6.50% Convertible Senior Notes, Net of Unamortized Discounts [Member]	Dec. 31, 2010 2010 Credit Facility [Member]	Sep. 30, 2013 2013 Amended Credit Facility [Member]	Sep. 30, 2013 2013 Amended Credit Facility [Member] First, Second and Third Quarter 2013 [Member]	Sep. 30, 2013 2013 Amended Credit Facility [Member] Fourth Quarter 2013 and First Quarter 2014 [Member]	Sep. 30, 2013 2013 Amended Credit Facility [Member] Second and Third Quarter 2014 [Member]	Sep. 30, 2013 2013 Amended Credit Facility [Member] Fourth Quarter 2014 and Thereafter [Member]	Sep. 30, 2013 7.875% Senior Notes [Member]	Dec. 31, 2012 7.875% Senior Notes [Member]	Sep. 30, 2013 7.875% Senior Notes [Member] Prior to August 15, 2014 [Member]	Sep. 30, 2013 7.875% Senior Notes [Member] Beginning August 15, 2014 [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable Federal Funds Rate plus			0.50%							0.50%
Interest rate			0.60%
Maximum available in form of cash or letters of credit			$ 50,000,000
Loans payable and current portion of long-term debt	59,665,000	85,152,000	48,000,000	40,000,000	5,554,000	6,122,000
Accounts receivable securing advances			77,600,000		8,700,000
Additional availability under program			2,000,000		200,000					225,000,000
Commitments supporting international programs					18,900,000
Interest rate terms, basis					EURIBOR
Weighted-average interest rate					1.90%
Interest rate terms, rates plus					1.75%
Debt stated interest rate							6.50%	6.50%							7.875%	7.875%
Debt instrument, frequency of periodic payment															Interest payable semi-annually in arrears on February 15th and August 15th
Maturity date							Aug. 15, 2013								Aug. 15, 2018
Redemption Terms															We may also redeem some or all of the Senior Notes prior to August 15, 2014, at a price equal to the principal amount plus a defined applicable premium. The applicable premium on any redemption date is the greater of 1% of the principal amount of the note or the excess of (1) the present value at such redemption date of the redemption price of the note at August 15, 2014, plus all required interest payments due on the note through August 15, 2014, computed using a discount rate equal to the Treasury Rate as of the redemption date plus 50 basis points; over (2) the principal amount of the note. In addition, we may redeem some or all of the Senior Notes beginning August 15, 2014, at prices ranging from 100% to 103.938% of the principal amount.
Minimum premium percentage of principal amount																	1.00%
Debt instrument, basis spread on variable Treasury Rate																	0.50%
Percentage of principal amount redemption price, minimum																		100.00%
Percentage of principal amount redemption price, maximum																		103.938%
Principal amount outstanding							35,100,000
Debt facility amount									350,000,000	250,000,000
Term of credit facility										5 years
Restructuring expenses related to credit facility 2013										30,000,000
Restructuring expenses related to credit facility 2014										20,000,000
Restructuring expenses related to credit facility 2015										10,000,000
Leverage ratio minimum											3.50	3.50	3.50	3.50
Leverage ratio maximum											4.25	4.00	3.75
Minimum liquidity for permitted acquisitions										$ 100,000,000
Leverage ratio										1.50
Maturity date										Aug. 24, 2015
Interest rate terms										The interest rate under the 2013 Amended Credit Facility is the sum of (A) either (1) LIBOR or (2) the higher of the Federal Funds Rate plus 0.5%, the Prime Rate, or LIBOR plus 1.0% and (B) a variable margin based on the Company's leverage.
Debt instrument, basis spread on variable LIBOR Rate plus										1.00%
Interest rate										3.40%