Valuation And Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012		Dec. 31, 2011
Allowance For Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 4,317	$ 3,019		$ 2,017
Additions charged/(credited) to expense	4,961	3,039		1,731
Charged to other accounts	(941)	(541)		83
Deductions	(204)	(1,200)		(812)
Balance at end of year	8,133	4,317		3,019
Reserve For Excess And Obsolete Inventory [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	3,534	2,542		2,205
Additions charged/(credited) to expense	1,801	777		431
Deductions	(994)	215		(94)
Balance at end of year	4,341	3,534		2,542
Deferred Income Tax Asset Allowance Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year		8,781	[1]	34,673	[1]
Additions charged/(credited) to expense		11,146	[1]	2,318	[1]
Deductions		(19,927)	[1]	(28,210)	[1]
Balance at end of year				$ 8,781	[1]

[1] Additions represent increases in valuation allowances against deferred tax assets; deductions represent decreases in valuation allowances against deferred tax assets.