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Business Segments, Concentration of Business, and Credit Risk and Significant Customers (Details 2) (USD $)
In Thousands, unless otherwise specified |
Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Dec. 31, 2010
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|---|---|---|---|---|
| Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets | ||||
| Cash and cash equivalents | $ 237,125 | $ 110,247 | $ 263,606 | $ 445,226 |
| Consolidated total assets | 1,259,729 | 1,068,064 | ||
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Reportable segments
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| Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets | ||||
| Consolidated total assets | 801,796 | 816,807 | 724,210 | |
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Unallocated to Segments
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| Reconciliations of total assets from reportable segments to the condensed consolidated balance sheets | ||||
| Cash and cash equivalents | 237,125 | 110,247 | ||
| Unallocated deferred tax assets | 35,632 | 30,662 | ||
| Other unallocated corporate assets | $ 185,176 | $ 110,348 |