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Stock-Based Compensation Plans - Summary of the Activity for the Company's Stock Option Awards (Detail) (USD $) In Thousands, except Share data, unless otherwise specified
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12 Months Ended |
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Dec. 31, 2014
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Dec. 31, 2013
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Dec. 31, 2012
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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|
|
| Options outstanding, Options, Beginning Balance |
1,237,000 |
1,595,000 |
4,500,000 |
| Granted, Options |
0 |
0 |
825,000 |
| Forfeited, Options |
(117,000) |
(358,000) |
(3,730,000) |
| Options outstanding, Options, Ending Balance |
1,120,000 |
1,237,000 |
1,595,000 |
| Options exercisable/vested at December 31, 2014 |
940,000 |
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|
| Granted, Exercise Price |
|
|
$ 1.45 |
| Forfeited, Exercise Price |
$ 5.22 |
$ 3.04 |
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| Options outstanding, Weighted Average Exercise Price, Beginning Balance |
$ 2.19 |
$ 2.38 |
$ 3.06 |
| Granted, Weighted Average Exercise Price |
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|
$ 1.45 |
| Forfeited, Weighted Average Exercise Price |
$ 5.22 |
$ 3.04 |
$ 3.00 |
| Options outstanding, Weighted Average Exercise Price, Ending Balance |
$ 1.87 |
$ 2.19 |
$ 2.38 |
| Options exercisable/vested at December 31, 2014, Weighted Average Exercise Price |
$ 1.95 |
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| Options outstanding, Aggregate Intrinsic Value, Ending balance |
$ 908 |
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| Options exercisable/vested at December 31, 2014, Aggregate Intrinsic Value |
$ 710 |
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| Minimum [Member] |
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|
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Options Outstanding, Exercise Price, Beginning Balance |
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$ 3.00 |
| Forfeited, Exercise Price |
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|
$ 3.00 |
| Options Outstanding, Exercise Price, Ending Balance |
$ 1.45 |
$ 1.45 |
$ 1.45 |
| Maximum [Member] |
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|
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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, Exercise Price, Beginning Balance |
|
|
$ 8.13 |
| Forfeited, Exercise Price |
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|
$ 3.04 |
| Options Outstanding, Exercise Price, Ending Balance |
$ 3.04 |
$ 8.13 |
$ 8.13 |