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Stock-Based Compensation and Stock Repurchases (Tables) | 3 Months Ended
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Mar. 31, 2017
Stock-Based Compensation and Stock Repurchases [Abstract] |
Schedule Of Fair Value Of Options, Weighted Average Assumptions |
﻿ |  |  |  |  |
﻿ | Three Months Ended March 31
﻿ | 2017 |  | 2016
﻿Stock option exercise price | $ | 15.97 |  | $ | 11.83
﻿Risk-free interest rate |  | 1.68% |  |  | 1.24%
﻿Expected dividend yield |  | -- |  |  | --
﻿Expected option life in years |  | 3.75 |  |  | 3.75
﻿Expected volatility |  | 24.92% |  |  | 24.94%
﻿Weighted average fair value | $ | 3.46 |  | $ | 2.48
﻿
Schedule Of Stock Options Outstanding And Exercisable |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Outstanding Stock Options
﻿ |  | Number of Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Years of Contractual | Aggregate Intrinsic Value
﻿ |  | Class A |  | Class A |  | Class A | Class A
﻿Balance - December 31, 2015 |  | 486,565 |  | $ | 8.68 |  | 2.89 | $ | 2,188,011
﻿Granted |  | 169,327 |  |  | 11.87 |  |  |  |
﻿Exercised |  | (46,815) |  |  | 9.50 |  |  | $ | 220,002
﻿Forfeited |  | (74,000) |  |  | 7.02 |  |  |  |
﻿Balance - December 31, 2016 |  | 535,077 |  | $ | 9.84 |  | 2.61 | $ | 3,615,191
﻿Granted |  | 149,841 |  |  | 15.97 |  |  |  |
﻿Exercised |  | (10,500) |  |  | 8.25 |  |  | $ | 91,020
﻿Forfeited |  | (2,500) |  |  | 6.23 |  |  |  |
﻿Balance - March 31, 2017 |  | 671,918 |  | $ | 11.25 |  | 1.88 | $ | 3,608,972
﻿ |  |  |  |  |  |  |  |  |
﻿
Summary Of Restricted Stock Units Granted |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  | Outstanding Restricted Stock Units
﻿ |  |  | RSU Grants (in units) |  | Total |  | Vested, |  | Unvested,
﻿Grant Date |  |  | Directors |  | Management |  | Grants |  | March 31, 2017 |  | March 31, 2017
﻿March 10, 2016 |  |  | 35,147 |  | 27,381 |  | 62,528 |  | 41,993 |  | 20,535
﻿April 11, 2016 |  |  | -- |  | 5,625 |  | 5,625 |  | -- |  | 5,625
﻿March 23, 2017 |  |  | 30,681 |  | 32,463 |  | 63,144 |  | -- |  | 63,144
﻿Total |  |  | 65,828 |  | 65,469 |  | 131,297 |  | 41,993 |  | 89,304
﻿

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited 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 Tabular disclosure of the number of fully vested share options (or share units) and share options expected to vest at the date of the latest statement of financial position, weighted-average exercise price (or conversion ratio), aggregate intrinsic value (except for nonpublic entities), and weighted-average remaining contractual term for both options (or share units) currently outstanding and options (or share units) exercisable (or convertible). + 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 (e) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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