Fair Value Measurement (Details) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Non-financial assets that were measured and recorded at fair value on a non-recurring basis
Intangible assets, other than goodwill and in-process research and development	$ 44,457	$ 47,538
Long-lived assets	91,068	93,725
Quoted Prices in Active Markets for Identical (Level 1) [Member]
Non-financial assets that were measured and recorded at fair value on a non-recurring basis
Intangible assets, other than goodwill and in-process research and development
Long-lived assets
Significant Other Observable Inputs (Level 2) [Member]
Non-financial assets that were measured and recorded at fair value on a non-recurring basis
Intangible assets, other than goodwill and in-process research and development
Long-lived assets
Significant Unobservable Inputs (Level 3) [Member]
Non-financial assets that were measured and recorded at fair value on a non-recurring basis
Intangible assets, other than goodwill and in-process research and development	289
Long-lived assets	11,675
Loss during the period [Member]
Non-financial assets that were measured and recorded at fair value on a non-recurring basis
Intangible assets, other than goodwill and in-process research and development	233
Long-lived assets	$ 2,820