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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2017
Earnings Per Share [Abstract] |
Schedule of Diluted Shares | ﻿ ﻿
﻿ |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended September 30, |  | Nine Months Ended September 30,
﻿ |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿ |  | (in thousands)
﻿Basic weighted average shares outstanding |  | 58,817 |  | 58,708 |  | 58,682 |  | 58,600
﻿Effect of dilutive securities |  | — |  | — |  | 4 |  | —
﻿Diluted weighted average shares outstanding |  | 58,817 |  | 58,708 |  | 58,686 |  | 58,600
﻿Stock options and unvested restricted stock grants excluded from dilutive calculation because they would be anti-dilutive |  | 3,007 |  | 4,098 |  | 2,799 |  | 4,455
﻿

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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