Long-Term Debt (Narrative - United States) (Details) $ / shares in Units, $ in Thousands			3 Months Ended		6 Months Ended
	Jun. 29, 2016 USD ($)	Mar. 13, 2015 USD ($)	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2015 $ / shares	Jun. 30, 2016 USD ($) $ / shares	Jun. 30, 2015 $ / shares	Dec. 31, 2015 USD ($)
Line of Credit Facility [Line Items]
Dividends					$ 829
Dividends paid per common share | $ / shares			$ 0.04	$ 0.04	$ 0.08	$ 0.08
Line of Credit Facility, Amount Outstanding			$ 165,270		$ 165,270		$ 165,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Maximum Borrowing Capacity	$ 275,000	$ 335,000
Debt Instrument, Restrictive Covenants					The First Amendment provides that liens on the collateral will be released upon satisfaction of certain conditions, including the submission by the loan parties of a compliance certificate for two consecutive fiscal quarters, calculated for the four consecutive fiscal quarters then ending, each evidencing a Leverage Ratio (defined as the Company's indebtedness less cash on hand in excess of $15,000, divided by the Company's consolidated EBITDA) of less than or equal to 2.75 to 1.00; provided that the last day of such two consecutive fiscal quarters cannot be earlier than June 30, 2018.Certain financial covenants in the Amended and Restated Credit Agreement were also amended. The First Amendment revises the maximum Leverage Ratio, which must not exceed the amounts set forth below for applicable fiscal quarters: June 30, 2016 and September 30, 2016, 4.75 to 1.00; December 31, 2016, 4.50 to 1.00; March 31, 2017, 4.25 to 1.00; June 30, 2017, 4.00 to 1.00; September 30, 2017, 3.75 to 1.00; December 31, 2017, 3.50 to 1.00; and March 31, 2018 and all fiscal quarters ending thereafter, 3.25 to 1.00. At June 30, 2016, the Company was in compliance with the covenants in the Amended and Restated Credit Agreement as revised by the First Amendment.Loans and advances to non-loan parties and loans, advances, and investments by domestic loan parties to subsidiaries that are not loan parties and to foreign loan parties is not permitted to exceed $10,000 in the aggregate at any one time, provided that, on March 31, 2018, when the maximum Leverage Ratio requirement is 3.25 to 1.00, this limit will increase to $75,000.
Leverage ratio			4.75		4.75
Leverage ratio in next quarter following current quarter					4.75
Leverage ratio in effect for the second quarter following the current quarter					4.50
Leverage ratio in effect for the third quarter following the current quarter					4.25
Leverage ratio in effect for the fourth quarter following the current quarter					4.00
Leverage ratio in effect for the fifth quarter following the current quarter					3.75
Leverage ratio in effect for the sixth quarter following the current quarter					3.50
Leverage ratio in effect for the seventh quarter following the current quarter					3.25
Leverage ratio in effect after the seventh quarter following the current quarter					3.25
Loans and advances limit					$ 10,000
Loans and advances limit thereafter					$ 75,000
Line of Credit Facility, Dividend Restrictions					The First Amendment permits the Company to pay dividends, distributions, and make redemptions with respect to its stock provided no event of default or potential default (as defined in the Amended and Restated Credit Agreement) has occurred prior to or after giving effect to the dividend, distribution, or redemption. Dividends, distributions, and redemptions are capped at $4,000 per year when funds are drawn on the facility until March 31, 2018, when the maximum Leverage Ratio requirement is 3.25 to 1.00, at which time this limit will increase to $25,000. Dividends of $829 or $0.08 per share were distributed for the six-month period ended June 30, 2016.If no drawings on the facility exist, dividends, distributions, and redemptions in excess of $4,000 (or $25,000, as appropriate) per year are subjected to a limitation of $75,000 in the aggregate. The $75,000 aggregate limitation also permits certain loans, investments, and acquisitions. The First Amendment provides that each of the loan parties and their subsidiaries shall not enter into any merger, consolidation, or other reorganization, or acquire all or substantially all of the assets, division, business, stock, or other ownership interests or permit any consolidation or merger with an aggregate consideration in excess of $12,000 until after March 31, 2018.
Maximum dividends, distributions, or redemptions allowed					$ 4,000
Maximum dividends, distributions, or redemptions allowed thereafter					25,000
Maximum dividends, distributions, or redemptions allowed, no draws					75,000
Maximum acquisition					$ 12,000
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Leverage ratio			2.75		2.75
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Federal Funds Rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.50%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Euro-rate [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.00%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Euro-rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	1.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Euro-rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	3.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Base Rate [Member] | Minimum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	0.025%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Base Rate [Member] | Maximum [Member]
Line of Credit Facility [Line Items]
Debt Instrument, Basis Spread on Variable Rate	2.25%
PNC Bank, N.A., Bank of America, N.A., Wells Fargo Bank, N.A., Citizens Bank of Pennsylvania, and Branch Banking and Trust Company [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of Credit Facility, Interest Rate Description		Borrowings under the First Amendment bear interest at rates based upon either the base rate or Euro-rate plus applicable margins. Applicable margins are dictated by the ratio of the Company's indebtedness less consolidated cash on hand to the Company's consolidated EBITDA, as defined in the underlying Amended and Restated Credit Agreement. The base rate is the highest of (a) PNC Bank's prime rate, (b) the Federal Funds Rate plus 0.50% or (c) the daily Euro-rate (as defined in the Amended and Restated Credit Agreement) plus 1.00%. The base rate and Euro-rate spreads range from 0.025% to 2.25% and 1.25% to 3.25%, respectively.
Line of Credit Facility, Amount Outstanding			$ 425		$ 425
Line of Credit Facility, Current Borrowing Capacity			$ 109,305		$ 109,305
Line of Credit Facility, Expiration Date	Mar. 13, 2020