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Stock-Based Compensation - Changes in the Number and Weighted-Average Grant-Date Fair Value of Non-Vested Stock Option Awards (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
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12 Months Ended |
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
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| Options Outstanding, Beginning balance |
8,073 |
7,858 |
6,802 |
| Stock option awards granted, options |
3,277 |
1,617 |
1,830 |
| Stock option awards forfeited/cancelled, Options Outstanding |
(1,801) |
(1,052) |
(584) |
| Options Outstanding, Ending balance |
8,986 |
8,073 |
7,858 |
| Weighted Average Exercise Price, Beginning balance |
$ 6.09 |
$ 6.21 |
$ 6.66 |
| Stock option awards granted, Weighted Average Grant-Date Fair Value |
$ 3.05 |
$ 4.65 |
$ 3.97 |
| Stock option awards forfeited, Weighted Average Grant-Date Fair Value |
$ 7.22 |
$ 6.26 |
$ 5.99 |
| Weighted Average Exercise Price, Ending balance |
$ 4.99 |
$ 6.09 |
$ 6.21 |
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Non Vested Award [Member]
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options Outstanding, Beginning balance |
2,435 |
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| Stock option awards granted, options |
3,277 |
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| Stock option awards vested, options |
(1,215) |
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| Stock option awards forfeited/cancelled, Options Outstanding |
(288) |
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| Options Outstanding, Ending balance |
4,209 |
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| Weighted Average Exercise Price, Beginning balance |
$ 3.18 |
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| Stock option awards granted, Weighted Average Grant-Date Fair Value |
$ 0.80 |
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| Stock option awards vested, Weighted Average Grant-Date Fair Value |
$ 2.87 |
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| Stock option awards forfeited, Weighted Average Grant-Date Fair Value |
$ 2.00 |
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| Weighted Average Exercise Price, Ending balance |
$ 1.50 |
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