Share Based Compensation - Share Based Compensation Expense (Income) Included in Operating Expense (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | 6 Months Ended | ||
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Jun. 30, 2014
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Jun. 30, 2013
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Jun. 30, 2014
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Jun. 30, 2013
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Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
Total share-based compensation | $ 3,219 | $ 1,460 | $ 3,532 | $ 11,875 |
General and administrative expense [Member]
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Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
Total share-based compensation | 1,290 | 501 | 1,267 | 6,013 |
Other Operating Expenses [Member]
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Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items] | ||||
Total share-based compensation | $ 1,929 | $ 959 | $ 2,265 | $ 5,862 |