v3.8.0.1

Stock Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract] |
Estimated Fair Value of Option Granted Using Black-Scholes Option Pricing Model | The fair value of each option granted in 2015 was estimated on the date of the grant using the Black-Scholes option pricing model with the following assumptions:
Expected Volatility |  |  | 20 | %
Expected Term |  |  | 6.5 years |
Expected Dividends |  |  | None |
Weighted Average Risk Free Rate: |  |  |  |
2015 grants |  |  | 1.714 | %
Weighted-Average Grant Fair Value: |  |  |  |
2015 grants |  |  | 9.88 |
Summary of Stock Option Activity | The following table summarizes the activities in the Plans during 2017:
(dollars in thousands except per share amounts) |  | Options Granted |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Balance: December 31, 2016 |  |  | 1,972,884 |  |  | $ | 6.34 |  |  |  |  |  |  |  |  |
Options granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Options exercised |  |  | (1,072,000 | ) |  |  | 5.18 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Balance: December 31, 2017 |  |  | 900,884 |  |  |  | 7.73 |  |  |  | 3.37 Years |  |  | $ | 9,738 |
Options exercisable |  |  | 900,884 |  |  | $ | 7.73 |  |  |  | 3.37 Years |  |  | $ | 9,738 |
The following table summarizes the activities in the Plans during 2016:
(dollars in thousands except per share amounts) |  | Options Granted |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Balance: December 31, 2015 |  |  | 2,716,834 |  |  | $ | 6.35 |  |  |  |  |  |  |  |  |
Options granted |  |  | — |  |  |  | — |  |  |  |  |  |  |  |  |
Options exercised |  |  | (690,592 | ) |  |  | 6.17 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | (53,358 | ) |  |  | 9.18 |  |  |  |  |  |  |  |  |
Balance: December 31, 2016 |  |  | 1,972,884 |  |  |  | 6.34 |  |  |  | 2.45 Years |  |  | $ | 15,601 |
Options exercisable |  |  | 1,945,032 |  |  | $ | 6.30 |  |  |  | 2.39 Years |  |  | $ | 15,457 |
The following table summarizes the activities in the Plans during 2015:
(dollars in thousands except per share amounts) |  | Options Granted |  |  | Weighted Average Exercise Price per Share |  |  | Weighted Average Remaining Contractual Term |  |  | Aggregate Intrinsic Value |
Balance: December 31, 2014 |  |  | 2,769,616 |  |  | $ | 6.34 |  |  |  |  |  |  |  |  |
Options granted |  |  | 23,000 |  |  |  | 9.88 |  |  |  |  |  |  |  |  |
Options exercised |  |  | (62,614 | ) |  |  | 6.47 |  |  |  |  |  |  |  |  |
Options forfeited |  |  | (13,168 | ) |  |  | 8.24 |  |  |  |  |  |  |  |  |
Balance: December 31, 2015 |  |  | 2,716,834 |  |  |  | 6.35 |  |  |  | 3.52 Years |  |  | $ | 14,782 |
Options exercisable |  |  | 2,599,010 |  |  | $ | 6.23 |  |  |  | 3.30 Years |  |  | $ | 14,463 |
Summary of RSUs Issued under Equity Incentive Plan | The following table provides a summary of the RSUs issued by the Company under its equity incentive plans for the periods ended December 31:
|  | 2017 |  | 2016 |  | 2015
|  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value |  | Shares |  | Weighted Average Grant Date Fair Value
Balance: January 1 |  | 117,308 |  |  | $ | 10.19 |  |  | 134,728 |  |  | $ | 9.93 |  |  | 8,888 |  |  | $ | 9.00 |
New RSUs |  | 110,463 |  |  |  | 17.62 |  |  | 50,568 |  |  |  | 11.15 |  |  | 147,364 |  |  |  | 10.00 |
Shares vested and issued |  | (78,005 | ) |  |  | 12.01 |  |  | (67,988 | ) |  |  | 10.39 |  |  | (21,524 | ) |  |  | 10.00 |
RSUs forfeited |  | — |  |  |  | — |  |  | — |  |  |  | — |  |  | — |  |  |  | — |
Balance December 31 |  | 149,766 |  |  | $ | 14.73 |  |  | 117,308 |  |  | $ | 10.19 |  |  | 134,728 |  |  | $ | 9.93 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: 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 Reference 3: 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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