Pension and Other Postretirement Benefit Plans (Textual) (Details) (USD $)	12 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012 Foreign Plan [Member]	Dec. 31, 2011 Foreign Plan [Member]	Dec. 31, 2010 Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions									$ 732,000	$ 778,000	$ 635,000
Percentage of total contributions made by employees	45.00%
Pension asset	6,939,000	6,945,000	6,685,000	6,815,000	6,359,000	6,125,000	6,387,000	5,642,000	6,939,000	6,359,000
Accumulated benefit obligation									28,100,000	25,200,000
Estimated future employer contributions in 2013									$ 677,000