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STOCK COMPENSATION PLANS | 3 Months Ended
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Mar. 31, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
STOCK COMPENSATION PLANS | NOTE 11 — STOCK COMPENSATION PLANS Pursuant to the Company’s 1998 Stock Incentive Plan, as amended, the Company issues stock options, restricted stock awards (“RSAs”) and restricted stock units (“RSUs”) to employees. The Company did not issue any stock options or RSAs during the three months ended March 31, 2016 and 2015. RSUs are granted under our long-term incentive plan at no cost to the recipient. RSUs vest ratably over three years or cliff vest after three or five years of continued employment from the date of the grant. RSUs entitle the recipient to receive cash dividends equivalent to any dividends paid on the underlying common stock. The RSU dividends are accrued during the vesting period and are paid at the time of vesting. While a portion of the RSUs are time-vesting awards, others vest subject to the attainment of specified performance goals. All RSUs are subject to forfeiture until vested. All RSAs have vested during 2015. The following table presents the total stock compensation expense and the related net tax benefit associated with the Company’s various employee share-based compensation plans for the three months ended March 31, 2016 and 2015:
($ in thousands) |  | Three Months Ended March 31,
| 2016 |  | 2015
Stock compensation costs |  | $ | 4,575 |  |  | $ | 3,954 |
Net tax benefit recognized in equity for stock compensation plans |  | $ | 986 |  |  | $ | 3,145 |
The following table presents a summary of the activity for the Company’s time-based and performance-based RSUs for the three months ended March 31, 2016 based on the target amount of awards:
|  | Three Months Ended March 31, 2016
| Time-Based RSUs |  | Performance-Based RSUs
| Shares |  | Weighted Average Grant-Date Fair Value |  | Shares |  | Weighted Average Grant-Date Fair Value
Outstanding at beginning of period |  | 933,312 |  |  | $ | 36.83 |  |  | 389,358 |  |  | $ | 34.21 |
Granted |  | 482,251 |  |  | 31.32 |  |  | 159,407 |  |  | 29.18 |
Vested |  | (111,724 | ) |  | 25.08 |  |  | (138,019 | ) |  | 25.25 |
Forfeited |  | (21,191 | ) |  | 35.97 |  |  | — |  |  | — |
Outstanding at end of period |  | 1,282,648 |  |  | $ | 35.80 |  |  | 410,746 |  |  | $ | 35.27 |
Compensation cost for the time-based awards is based on the quoted market price of the Company’s stock at the grant date. Performance-based awards granted that include discretionary performance-based vesting conditions are subject to variable accounting. As of March 31, 2016, total unrecognized compensation cost related to time-based and performance-based RSUs amounted to $34.9 million and $13.3 million, respectively. This cost is expected to be recognized over a weighted average period of 2.23 years and 2.06 years, respectively.

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- Definition The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 40 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6418621&loc=d3e17540-113929 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 50 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51659978&loc=d3e25284-112666 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5444-113901 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 14 + Details
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