Fair Value Measurements (Details) (Recurring Fair Value Measurements [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Assets
Total assets	$ 1,570	$ 1,544
Liabilities
Total liabilities	646	617
Marketable securities [Member]
Assets
Total assets	633	617
Cash surrender value of life insurance policies [Member]
Assets
Total assets	937	910
Deferred compensation plans [Member]
Liabilities
Total liabilities	633	617
Foreign exchange contracts [Member]
Assets
Total assets		17
Liabilities
Total liabilities	13
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member]
Assets
Total assets	633	617
Liabilities
Total liabilities	633	617
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Marketable securities [Member]
Assets
Total assets	633	617
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Cash surrender value of life insurance policies [Member]
Assets
Total assets	0	0
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Deferred compensation plans [Member]
Liabilities
Total liabilities	633	617
Quoted Prices In Active Markets for Identical Assets (Level 1) [Member] | Foreign exchange contracts [Member]
Assets
Total assets		0
Liabilities
Total liabilities	0
Significant Other Observable Inputs (Level 2) [Member]
Assets
Total assets	937	927
Liabilities
Total liabilities	13	0
Significant Other Observable Inputs (Level 2) [Member] | Marketable securities [Member]
Assets
Total assets	0	0
Significant Other Observable Inputs (Level 2) [Member] | Cash surrender value of life insurance policies [Member]
Assets
Total assets	937	910
Significant Other Observable Inputs (Level 2) [Member] | Deferred compensation plans [Member]
Liabilities
Total liabilities	0	0
Significant Other Observable Inputs (Level 2) [Member] | Foreign exchange contracts [Member]
Assets
Total assets		17
Liabilities
Total liabilities	13
Significant Unobservable Inputs (Level 3) [Member]
Assets
Total assets	0	0
Liabilities
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) [Member] | Marketable securities [Member]
Assets
Total assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Cash surrender value of life insurance policies [Member]
Assets
Total assets	0	0
Significant Unobservable Inputs (Level 3) [Member] | Deferred compensation plans [Member]
Liabilities
Total liabilities	0	0
Significant Unobservable Inputs (Level 3) [Member] | Foreign exchange contracts [Member]
Assets
Total assets		0
Liabilities
Total liabilities	$ 0