Fair Value Disclosure (On a Recurring Basis) (Details) - Fair value measurements, recurring - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014	Sep. 30, 2014
Level 1
Assets:
Available for sale securities	$ 6,905	$ 7,220	$ 6,955
Interest rate swap agreements		0	0
Foreign currency exchange contracts	0	0	0
Assets at fair value	6,905	7,220	6,955
Liabilities:
Interest rate swap agreements	0	0
Foreign currency exchange contracts	0		0
Contingent consideration			0
Liabilities at fair value	0	0	0
Level 2
Assets:
Available for sale securities	0	0	0
Interest rate swap agreements		181	538
Foreign currency exchange contracts	364	292	213
Assets at fair value	364	473	751
Liabilities:
Interest rate swap agreements	$ 1,804	412
Foreign currency exchange contracts			29
Contingent consideration			0
Liabilities at fair value	$ 1,804	412	29
Level 3
Assets:
Available for sale securities	0	0	0
Interest rate swap agreements		0
Foreign currency exchange contracts	0	0	0
Assets at fair value	0	0	0
Liabilities:
Interest rate swap agreements	0	0
Foreign currency exchange contracts	0		0
Contingent consideration			1,606
Liabilities at fair value	0	0	1,606
Total
Assets:
Available for sale securities	6,905	7,220	6,955
Interest rate swap agreements		181	538
Foreign currency exchange contracts	364	292	213
Assets at fair value	7,269	7,693	7,706
Liabilities:
Interest rate swap agreements	1,804	412
Foreign currency exchange contracts	0		29
Contingent consideration			1,606
Liabilities at fair value	$ 1,804	$ 412	$ 1,635