Borrowings (Narrative) (Details)

6 Months Ended

3 Months Ended

Jun. 30, 2012

USD ($)

Jun. 30, 2012

GBP (£)

Dec. 31, 2011

USD ($)

Jun. 30, 2012

Letter of Credit [Member]

USD ($)

Jun. 30, 2012

Foreign Line of Credit [Member]

USD ($)

Jun. 30, 2012

PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A. and Citizens Bank of Pennsylvania [Member]

Revolving Credit Facility [Member]

USD ($)

Jun. 30, 2012

NatWest Bank [Member]

Foreign Line of Credit [Member]

GBP (£)

Line of Credit Facility [Line Items]

Line of Credit Facility, Maximum Borrowing Capacity

£ 1,500,000

$ 15,000,000

$ 125,000,000

£ 2,356,000

Line of Credit Facility, Description

This Credit Agreement replaced a prior revolving credit facility with a maximum credit line of $90,000,000 and a $20,000,000 term loan

Line of Credit Facility, Borrowing Capacity, Description

The Credit Agreement provides for a five-year, unsecured revolving credit facility that permits borrowing up to $125,000,000 for the U.S. borrowers and a sublimit of the equivalent of $15,000,000 U.S. dollars that is available to the Canadian borrowers.

Line of Credit Facility, Provision for Increase in Capacity

50,000,000

Line of Credit Facility, Capacity Available for Trade Purchases

20,000,000

Line of Credit Facility, Interest Rate Description

Borrowings under the Credit Agreement will bear interest at rates based upon either the base rate or LIBOR-based rate plus applicable margins. Applicable margins are dictated by the ratio of the Company's indebtedness less cash on hand to the Company's consolidated EBITDA, as defined in the underlying Credit Agreement. The base rate is the highest of (a) PNC Bank's prime rate, (b) the Federal Funds Rate plus .50% or (c) the daily LIBOR rate, as defined in the underlying Credit Agreement, plus 1.00%. The base rate spread ranges from 0.00% to 1.00%. LIBOR-based rates are determined by dividing the published LIBOR rate by a number equal to 1.00 minus the percentage prescribed by the Federal Reserve for determining the maximum reserve requirements with respect to any Eurocurrency funding by banks on such day. The LIBOR-based rate spread ranges from 1.00% to 2.00%.

The interest rate on this facility is the financial institution's base rate plus 1.50%.

Line of Credit Facility, Covenant Terms

The Credit Agreement includes two financial covenants: (a) the Leverage Ratio, defined as the Company's Indebtedness less cash on hand divided by the Company's consolidated EBITDA, which must not exceed 3.00 to 1.00 and (b) Minimum Interest Coverage, defined as consolidated EBITDA less Capital Expenditures divided by consolidated interest expense, which must be no less than 3.00 to 1.00.

Line of Credit Facility, Dividend Restrictions

The Credit Agreement permits the Company to pay dividends and distributions and make redemptions with respect to its stock providing no event of default or potential default (as defined in the facility agreement) has occurred prior to or after giving effect to the dividend, distribution, or redemption. Dividends, distributions, and redemptions are capped at $15,000,000 per year when funds are drawn on the facility. If no drawings on the facility exist, dividends, distributions, and redemptions in excess of $15,000,000 per year are subjected to a limitation of $75,000,000 in aggregate. The $75,000,000 aggregate limitation also includes certain loans, investments, and acquisitions. The Company is permitted to acquire the stock or assets of other entities with limited restrictions providing that the Leverage Ratio does not exceed 2.50 to 1.00 after giving effect to the acquisition.

Line of Credit Facility, Amount Outstanding

1,161,000

Line of Credit Facility, Current Borrowing Capacity

$ 123,839,000

Line of Credit Facility, Collateral

This credit facility supports the working capital requirements and is collateralized by substantially all of the assets of its United Kingdom operations

Line of Credit Facility, Expiration Date

May 02, 2016

Borrowings (Narrative) (Details)	6 Months Ended					3 Months Ended
Borrowings (Narrative) (Details)	Jun. 30, 2012 USD ($)	Jun. 30, 2012 GBP (£)	Dec. 31, 2011 USD ($)	Jun. 30, 2012 Letter of Credit [Member] USD ($)	Jun. 30, 2012 Foreign Line of Credit [Member] USD ($)	Jun. 30, 2012 PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A. and Citizens Bank of Pennsylvania [Member] Revolving Credit Facility [Member] USD ($)	Jun. 30, 2012 NatWest Bank [Member] Foreign Line of Credit [Member] GBP (£)
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity		£ 1,500,000			$ 15,000,000	$ 125,000,000	£ 2,356,000
Line of Credit Facility, Description						This Credit Agreement replaced a prior revolving credit facility with a maximum credit line of $90,000,000 and a $20,000,000 term loan
Line of Credit Facility, Borrowing Capacity, Description						The Credit Agreement provides for a five-year, unsecured revolving credit facility that permits borrowing up to $125,000,000 for the U.S. borrowers and a sublimit of the equivalent of $15,000,000 U.S. dollars that is available to the Canadian borrowers.
Line of Credit Facility, Provision for Increase in Capacity	50,000,000
Line of Credit Facility, Capacity Available for Trade Purchases	20,000,000
Line of Credit Facility, Interest Rate Description						Borrowings under the Credit Agreement will bear interest at rates based upon either the base rate or LIBOR-based rate plus applicable margins. Applicable margins are dictated by the ratio of the Company's indebtedness less cash on hand to the Company's consolidated EBITDA, as defined in the underlying Credit Agreement. The base rate is the highest of (a) PNC Bank's prime rate, (b) the Federal Funds Rate plus .50% or (c) the daily LIBOR rate, as defined in the underlying Credit Agreement, plus 1.00%. The base rate spread ranges from 0.00% to 1.00%. LIBOR-based rates are determined by dividing the published LIBOR rate by a number equal to 1.00 minus the percentage prescribed by the Federal Reserve for determining the maximum reserve requirements with respect to any Eurocurrency funding by banks on such day. The LIBOR-based rate spread ranges from 1.00% to 2.00%.	The interest rate on this facility is the financial institution's base rate plus 1.50%.
Line of Credit Facility, Covenant Terms						The Credit Agreement includes two financial covenants: (a) the Leverage Ratio, defined as the Company's Indebtedness less cash on hand divided by the Company's consolidated EBITDA, which must not exceed 3.00 to 1.00 and (b) Minimum Interest Coverage, defined as consolidated EBITDA less Capital Expenditures divided by consolidated interest expense, which must be no less than 3.00 to 1.00.
Line of Credit Facility, Dividend Restrictions						The Credit Agreement permits the Company to pay dividends and distributions and make redemptions with respect to its stock providing no event of default or potential default (as defined in the facility agreement) has occurred prior to or after giving effect to the dividend, distribution, or redemption. Dividends, distributions, and redemptions are capped at $15,000,000 per year when funds are drawn on the facility. If no drawings on the facility exist, dividends, distributions, and redemptions in excess of $15,000,000 per year are subjected to a limitation of $75,000,000 in aggregate. The $75,000,000 aggregate limitation also includes certain loans, investments, and acquisitions. The Company is permitted to acquire the stock or assets of other entities with limited restrictions providing that the Leverage Ratio does not exceed 2.50 to 1.00 after giving effect to the acquisition.
Line of Credit Facility, Amount Outstanding	0		0	1,161,000
Line of Credit Facility, Current Borrowing Capacity						$ 123,839,000
Line of Credit Facility, Collateral							This credit facility supports the working capital requirements and is collateralized by substantially all of the assets of its United Kingdom operations
Line of Credit Facility, Expiration Date							May 02, 2016