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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2016
Stock-Based Compensation [Abstract] |
Schedule Of Stock-Based Compensation Expense |
﻿ |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿(in thousands) | 2016 |  | 2015 |  | 2014
﻿Stock-based compensation expense | $ | 31,295 |  | $ | 34,733 |  | $ | 32,793
﻿
Schedule Of Shares And Units Of Restricted Common Stock |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31,
﻿ |  | 2016 |  |  | 2015 |  |  | 2014
﻿(in thousands, except per share amounts) |  | Number of Shares/Units |  | Weighted Average Grant Date Fair Value |  |  | Number of Shares/Units |  | Weighted Average Grant Date Fair Value |  |  | Number of Shares/Units |  | Weighted Average Grant Date Fair Value
﻿Outstanding at beginning of period — unvested |  | 2,942 |  | $ | 36.55 |  |  | 2,806 |  | $ | 41.08 |  |  | 2,523 |  | $ | 41.21
﻿Granted |  | 2,516 |  | $ | 11.57 |  |  | 1,438 |  | $ | 16.12 |  |  | 1,031 |  | $ | 49.46
﻿Cancelled |  | (526) |  | $ | 38.64 |  |  | (672) |  | $ | 46.20 |  |  | (85) |  | $ | 39.52
﻿Vested |  | (1,151) |  | $ | 40.99 |  |  | (630) |  | $ | 23.89 |  |  | (663) |  | $ | 12.59
﻿Outstanding at end of period — unvested |  | 3,781 |  | $ | 36.34 |  |  | 2,942 |  | $ | 36.55 |  |  | 2,806 |  | $ | 41.08
﻿
Schedule Of Weighted-Average Fair Value Assumptions |
﻿ |  |  |  |  |  |  |  |
﻿ | Year Ended December 31,
﻿ | 2016 |  | 2015 |  | 2014
﻿Stock option assumptions: |  |  |  |  |  |  |  |
﻿Weighted-average fair value | $ | 7.80 |  | $ | — |  | $ | —
﻿Expected volatility |  | 60.0% |  |  | — |  |  | —
﻿Risk-free interest rate |  | 0.76%-1.46 |  |  | — |  |  | —
﻿Expected dividend yield |  | 0% |  |  | — |  |  | —
﻿Derived term in years |  | 3-4 |  |  | — |  |  | —
﻿
Schedule Of Stock Option Activity |
﻿ |  |  |  |  |  |  |  |
﻿ |  | Year Ended December 31, 2016
﻿(in thousands, except per share amounts) |  | Number of Shares |  | Weighted Average Exercise |  |  | Weighted Average Remaining Term (in years)
﻿Stock option activity: |  |  |  |  |  |  |  |
﻿Outstanding at beginning of period |  | — |  | $ | — |  |  |
﻿Granted |  | 2,260 |  |  | 13.92 |  |  |
﻿Exercised |  | — |  |  | — |  |  |
﻿Forfeited and expired |  | — |  |  | — |  |  |
﻿Outstanding at end of period |  | 2,260 |  | $ | 13.92 |  |  | 9.5
﻿Exercisable at end of period |  | — |  | $ | — |  |  | —
﻿

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + 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) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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