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Earnings Per Common Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Common Share [Abstract] |
Earnings Per Common Share | ﻿ ﻿ 11. Earnings Per Common Share The Company calculates earnings per share using the two-class method. The two-class method allocates net income to each class of common stock and participating security according to common dividends declared and participation rights in undistributed earnings. Participating secur ities consist of nonvested share-based payment awards that contain nonforfeitable rights to dividends or dividend equivalents. A summary of the information used in the computation of earnings per common share follows. ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  | Three Months Ended |  | Nine Months Ended
﻿ |  | September 30, |  | September 30,
﻿(in thousands, except per share data) |  | 2018 |  | 2017 |  | 2018 |  | 2017
﻿Numerator: |  |  |  |  |  |  |  |  |  |  |  |
﻿Net income to common shareholders |  | $ | 83,878 |  | $ | 58,902 |  | $ | 227,530 |  | $ | 160,183
﻿Net income allocated to participating securities - basic and diluted |  |  | 1,544 |  |  | 1,244 |  |  | 4,238 |  |  | 3,566
﻿Net income allocated to common shareholders - basic and diluted |  | $ | 82,334 |  | $ | 57,658 |  | $ | 223,292 |  | $ | 156,617
﻿Denominator: |  |  |  |  |  |  |  |  |  |  |  |
﻿Weighted-average common shares - basic |  | $ | 85,348 |  | $ | 84,749 |  | $ | 85,298 |  | $ | 84,577
﻿Dilutive potential common shares |  |  | 191 |  |  | 231 |  |  | 184 |  |  | 241
﻿Weighted-average common shares - diluted |  | $ | 85,539 |  | $ | 84,980 |  | $ | 85,482 |  | $ | 84,818
﻿Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
﻿Basic |  | $ | 0.96 |  | $ | 0.68 |  | $ | 2.62 |  | $ | 1.85
﻿Diluted |  | $ | 0.96 |  | $ | 0.68 |  | $ | 2.61 |  | $ | 1.85
﻿ Potential common shares consist of stock options, nonvested performance-based awards, and nonvested restricted share awards deferred under the Company’s nonqualified deferred compensation plan. These potential co mmon shares do not enter into the calculation of diluted earnings per sh are if the impact would be anti dilutive, i.e., increase earnings per share or redu ce a loss per share. Weighted average antidilutive potential common shares totaled 14,904 and 18,257, respectively, for the three and nine months ended September 30, 2018. Weighted average antidilutive potential common shares totaled 1,380 and 11,057, respectively, for the three and nine months ended September 30, 2017.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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