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Fair Value Measurements Fair Value, Reconciliation of Level 3 - Assets (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
Convertible Debt Securities [Member]
        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
AFS Securities, Beginning Asset Value $ 2,693 $ 3,341 $ 3,174 $ 3,087
AFS Debt Security, (losses) included in OCI (63) (108) (544) 146
AFS Securities, Ending Asset Value 2,630 3,233 2,630 3,233
Unrealized (Gains) Losses Still Held - Assets (63) [1] (108) [1] (544) [1] 146 [1]
Redeemable Preferred Stock [Member]
        
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
AFS Securities, Beginning Asset Value 4,599 [2] 42,539 [2] 0 [2] 42,539 [2]
AFS Debt Security, (losses) included in OCI (55) 0 (55) 0
Purchase of redeemable preferred shares 0 0 4,599 0
AFS Securities, Ending Asset Value 4,544 [2] 42,539 [2] 4,544 [2] 42,539 [2]
Unrealized (Gains) Losses Still Held - Assets $ (55) [1] $ 0 [1] $ (55) [1] $ 0 [1]
[1] Represents the unrealized losses or gains recorded in earnings or other comprehensive (loss) income during the period for assets and liabilities classified as Level 3 that are still held (or outstanding) at the end of the period.
[2] For the three and six months ending June 30, 2013, the Company's investments in Life Media Limited (F-tuan) preferred shares were previously classified as cost method investments and have been reclassified to the available-for-sale category in this table. The balance as of June 30, 2013 represents the Company’s investments in F-tuan preferred shares, which were written down to zero through an other-than-temporary impairment charge as of December 31, 2013 and continue to have an estimated fair value of zero as of June 30, 2014. The $4.5 million balance as of June 30, 2014 represents the Company's investment in the preferred shares of an online home services company during the current period, as described in Note 4 "Investments."