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Employee Compensation and Benefit Plans Schedule of Stock Unit Activity (Details) - $ / shares | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |  |  |  |
Unvested at beginning of year (in shares) |  | 835,730 | [1],[2] | 79,612 | [1],[2] | 28,235
Unvested at beginning of year (in dollar per share) |  | $ 10.00 | [1],[2] | $ 32.23 | [1],[2] | $ 25.23
Granted (in shares) | [3],[4] | 2,184,100 |  | 790,397 |  | 63,500
Granted (in dollar per share) | [3],[4] | $ 2.19 |  | $ 8.53 |  | $ 34.34
Vested (in shares) | [5],[6] | (26,666) |  | (34,279) |  | (12,123)
Vested (in dollar per share) | [5],[6] | $ 32.56 |  | $ 27.92 |  | $ 26.98
Forfeited/Canceled (in shares) |  | (241,110) |  | 0 |  | 0
Forfeited/Canceled (in dollar per share) |  | $ 6.17 |  | $ 0.00 |  | $ 0.00
Unvested at end of year (in shares) | [1],[2] | 2,752,054 |  | 835,730 |  | 79,612
Unvested at end of year (in dollar per share) | [1],[2] | $ 3.91 |  | $ 10.00 |  | $ 32.23
[1] | At December 31, 2016, the weighted average remaining contractual term of share units outstanding was 2.60 years.
[2] | Excluding the 502,446 market-based stock awards that have not met their performance criteria, the net aggregate intrinsic value of stock awards outstanding at December 31, 2016 was $12.1 million.
[3] | Stock units granted in 2015 included 584,438 stock units with a market condition for vesting based on an average common stock trading price of $16.26. As of December 31, 2016, these awards had not yet met the market condition.
[4] | Stock units granted in 2016 included 1,156,500 stock units with a market condition for vesting based on an average common stock trading price of $4.78. The market condition for these awards was met on November 30, 2016.
[5] | The total fair value of the stock units that vested during 2016, 2015 and 2014, based on grant-date fair value, was $0.9 million, $1.0 million and $0.3 million, respectively.
[6] | The total intrinsic value of stock units vested, which is defined as the market value of the stock on the date of vesting, was $0.1 million, $0.3 million and $0.3 million for 2016, 2015 and 2014, respectively.

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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iv)(3) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2)(iii)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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