Income Taxes (Components of Income Tax Expense) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current Income Tax Expense (Benefit) [Abstract]
Federal	$ 266	$ 342	$ 1,237
State	167	320	822
Foreign	5,371	4,497	2,990
Current income tax provision	5,804	5,159	5,049
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Federal	6,185	3,827	3,699
State	(351)	31	44
Foreign	(760)	(1,557)	(1,755)
Deferred income tax provision	5,074	2,301	1,988
Provision for income taxes from ongoing operations at effective tax rate	10,878	7,460	7,037
Provision for income taxes from discrete items	0	0	(4,920)
Total provision for income taxes	10,878	7,460	2,117
Release of valuation allowance [Member]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Provision for income taxes from discrete items	0	0	(6,625)
Windfall expense related to stock compensation [Member]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Provision for income taxes from discrete items	0	0	1,938
Enhanced R&D deduction - foreign operations [Member]
Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract]
Provision for income taxes from discrete items	$ 0	$ 0	$ (233)