Fair Value Disclosure (On a Recurring Basis) (Details) - Fair value measurements, recurring - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Level 1
Assets:
Available for sale securities	$ 7,256	$ 7,220	$ 6,906
Interest rate swap agreements	0	0	0
Foreign currency exchange contracts	0	0
Assets at fair value	7,256	7,220	6,906
Liabilities:
Interest rate swap agreements	0	0	0
Foreign currency exchange contracts			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	30	181	278
Foreign currency exchange contracts	240	292
Assets at fair value	270	473	278
Liabilities:
Interest rate swap agreements	951	412	602
Foreign currency exchange contracts			393
Contingent consideration			0
Liabilities at fair value	951	412	995
Level 3
Assets:
Available for sale securities	0	0	0
Interest rate swap agreements	0	0	0
Foreign currency exchange contracts	0	0
Assets at fair value	0	0	0
Liabilities:
Interest rate swap agreements	0	0	0
Foreign currency exchange contracts			0
Contingent consideration			1,597
Liabilities at fair value	0	0	1,597
Total
Assets:
Available for sale securities	7,256	7,220	6,906
Interest rate swap agreements	30	181	278
Foreign currency exchange contracts	240	292
Assets at fair value	7,526	7,693	7,184
Liabilities:
Interest rate swap agreements	951	412	602
Foreign currency exchange contracts			393
Contingent consideration			1,597
Liabilities at fair value	$ 951	$ 412	$ 2,592