Fair Value Disclosure (On a Recurring Basis) (Details) (Fair value measurements, recurring, USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Sep. 30, 2013
Level 1
Assets:
Available for sale securities	$ 6,955	$ 6,540	$ 6,010
Interest rate swap agreements	0	0	0
Foreign currency exchange contracts	0	0	0
Assets at fair value	6,955	6,540	6,010
Liabilities:
Foreign currency exchange contracts	0	0
Contingent consideration	0	0	0
Liabilities at fair value	0	0	0
Level 2
Assets:
Available for sale securities	0	0	0
Interest rate swap agreements	538	937	645
Foreign currency exchange contracts	213	83	111
Assets at fair value	751	1,020	756
Liabilities:
Foreign currency exchange contracts	29	14
Contingent consideration	0	0	0
Liabilities at fair value	29	14	0
Level 3
Assets:
Available for sale securities	0	0	0
Interest rate swap agreements	0	0	0
Foreign currency exchange contracts	0	0	0
Assets at fair value	0	0	0
Liabilities:
Foreign currency exchange contracts	0	0
Contingent consideration	1,606	1,581	1,572
Liabilities at fair value	1,606	1,581	1,572
Total
Assets:
Available for sale securities	6,955	6,540	6,010
Interest rate swap agreements	538	937	645
Foreign currency exchange contracts	213	83	111
Assets at fair value	7,706	7,560	6,766
Liabilities:
Foreign currency exchange contracts	29	14
Contingent consideration	1,606	1,581	1,572
Liabilities at fair value	$ 1,635	$ 1,595	$ 1,572