Schedule II - Valuation and Qualifying Accounts Schedule II - 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 Receivable [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	$ 1,157	$ 1,719	$ 1,126
Provision for doubtful accounts	1,147	442	976
Write-off of accounts receivable against allowance	(1,276)	(1,004)	(725)
Other	21	0	342
Ending balance	1,049	1,157	1,719
Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Beginning balance	0	0	(6,626)
Decrease (increase)	0	0	6,626
Ending balance	$ 0	$ 0	$ 0