Retirement Plans (Information About Plan Assets) (United States) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Cash and cash equivalents	$ 84,665	$ 64,793
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Policies and Strategies Narrative Description	Plan assets consist primarily of various fixed income and equity investments. The Company's primary investment objective is to provide long-term growth of capital while accepting a moderate level of risk. The investments are limited to cash and equivalents, bonds, preferred stocks and common stocks. The investment target ranges and actual allocation of pension plan assets by major category at December 31, 2012 and 2011 are as follows
Defined Benefit Plan, Plan Assets at Fair Value, Valuation Techniques	In accordance with the fair value disclosure requirements with FASB ASC 820, "Fair Value Measurements and Disclosures," the following assets were measured at fair value on a recurring basis at December 31, 2012 and 2011. Additional information regarding FASB ASC 820 and the fair value hierarchy can be found in Note 20, Fair Value Measurements
Cash and cash equivalents	984	513
Fixed income funds: Government bonds		1,342
Fixed income funds: Corporate bonds	4,168	3,146
Total fixed income funds	4,168	4,488
Equity funds and equities: Mutual funds	7,163	678
Equity funds and equities: Common stock	947	6,409
Total equity funds and equities	8,110	7,087
Fair value of plan assets	$ 13,262	$ 12,088	$ 11,433
Cash and Cash Equivalents [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Cash and cash equivalents
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	10.00%
Defined Benefit Plan, Actual Plan Asset Allocations	7.00%	4.00%
Fixed Income Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Total fixed income funds
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	30.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	50.00%
Defined Benefit Plan, Actual Plan Asset Allocations	31.00%	37.00%
Equity Funds [Member] | United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Total mutual funds / equities
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	50.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	70.00%
Defined Benefit Plan, Actual Plan Asset Allocations	62.00%	59.00%