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Stock-Based Compensation and Stock Repurchases (Tables) | 6 Months Ended
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Jun. 30, 2017
Stock-Based Compensation and Stock Repurchases [Abstract] |
Schedule Of Fair Value Of Options, Weighted Average Assumptions |
﻿ |  |  |
﻿ | Six Months Ended June 30
﻿ | 2017 |  | 2016
﻿Stock option exercise price | $ | 15.97 | 11.87
﻿Risk-free interest rate |  | 1.68% | 1.20%
﻿Expected dividend yield |  | -- | --
﻿Expected option life in years |  | 3.75 | 3.75
﻿Expected volatility |  | 24.92% | 25.01%
﻿Weighted average fair value | $ | 3.46 | 2.49
﻿
Schedule Of Stock Options Outstanding And Exercisable |
﻿ |  |  |  |  |  |  |  |  |
﻿ |  | Outstanding Stock Options
﻿ |  | Number of Options |  | Weighted Average Exercise Price |  | Weighted Average Remaining Years of Contractual Life | 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 |  | (103,750) |  |  | 9.04 |  |  | $ | 686,893
﻿Forfeited |  | (2,500) |  |  | 6.23 |  |  |  |
﻿Balance - June 30, 2017 |  | 578,668 |  | $ | 11.59 |  | 1.97 | $ | 3,338,646
﻿ |  |  |  |  |  |  |  |  |
﻿
Summary Of Restricted Stock Units Granted |
﻿ |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  | Outstanding Restricted Stock Units
﻿ |  |  | RSU Grants (in units) |  | Total |  | Vested, |  | Unvested,
﻿Grant Date |  |  | Directors |  | Management |  | Grants |  | June 30, 2017 |  | June 30, 2017
﻿March 10, 2016 |  |  | 35,147 |  | 27,381 |  | 62,528 |  | 41,992 |  | 20,536
﻿April 11, 2016 |  |  | -- |  | 5,625 |  | 5,625 |  | 1,406 |  | 4,219
﻿March 23, 2017 |  |  | 30,681 |  | 32,463 |  | 63,144 |  | -- |  | 63,144
﻿Total |  |  | 65,828 |  | 65,469 |  | 131,297 |  | 43,398 |  | 87,899
﻿

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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=96867065&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=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of number, weighted-average exercise price or conversion ratio, aggregate intrinsic value, and weighted-average remaining contractual term for outstanding and exercisable options that are fully vested and expected to vest. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur. + 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=96867065&loc=d3e5070-113901 + Details
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