CONDENSED CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (unaudited) - USD ($) $ in Thousands |
Total |
Common Class A [Member] |
Common Class B [Member |
Additional Paid In Capital [Member] |
Retained Earnings [Member] |
Accumulated Other Comprehensive Income (Loss) [Member] |
| Opening Balance SHARES at Dec. 31, 2017 |
|
139,675,781
|
4,045,199
|
|
|
|
| Compensation expense related to granting of restricted stock awards SHARES |
|
(157,680)
|
0
|
|
|
|
| Issuance of common stock related to an incentive plan SHARES |
|
39,196
|
0
|
|
|
|
| Common stock repurchase SHARES |
|
(1,833,200)
|
0
|
|
|
|
| Exercise of stock options SHARES |
|
10,000
|
0
|
|
|
|
| Purchase of vested employee restricted stock units SHARES |
|
(328,196)
|
0
|
|
|
|
| Ending Balance SHARES at Mar. 31, 2018 |
|
137,405,901
|
4,045,199
|
|
|
|
| Opening Balance VALUE at Dec. 31, 2017 |
$ 1,764,360
|
$ 1,397
|
$ 40
|
$ 1,737,132
|
$ 25,791
|
|
| NET INCOME (LOSS) |
(13,878)
|
0
|
0
|
0
|
(13,878)
|
|
| Compensation expense related to granting of restricted stock awards VALUE |
3,913
|
(2)
|
0
|
3,915
|
0
|
|
| Issuance of common stock related to an incentive plan VALUE |
321
|
0
|
0
|
321
|
0
|
|
| Exercise of stock options VALUE |
13
|
0
|
0
|
13
|
0
|
|
| Common stock repurchase VALUE |
(19,379)
|
(18)
|
0
|
(19,361)
|
0
|
|
| Purchase of vested employee restricted stock units VALUE |
3,463
|
3
|
0
|
3,460
|
0
|
|
| Payments of dividends on common stock VALUE |
(13,036)
|
0
|
0
|
(13,036)
|
0
|
|
| Dividend equivalents, net of forfeitures |
342
|
0
|
0
|
342
|
0
|
|
| Ending Balance VALUE at Mar. 31, 2018 |
1,719,193
|
$ 1,374
|
$ 40
|
1,705,866
|
11,913
|
|
| Opening Balance SHARES at Dec. 31, 2017 |
|
139,675,781
|
4,045,199
|
|
|
|
| Ending Balance SHARES at Jun. 30, 2018 |
|
138,527,246
|
4,045,199
|
|
|
|
| Opening Balance VALUE at Dec. 31, 2017 |
1,764,360
|
$ 1,397
|
$ 40
|
1,737,132
|
25,791
|
|
| NET INCOME (LOSS) |
(11,437)
|
|
|
|
|
|
| Purchase of vested employee restricted stock units VALUE |
5,172
|
|
|
|
|
|
| Net unrealized gain (loss) on derivatives VALUE |
0
|
|
|
|
|
|
| Ending Balance VALUE at Jun. 30, 2018 |
1,711,486
|
$ 1,385
|
$ 40
|
1,695,707
|
14,354
|
|
| Opening Balance SHARES at Mar. 31, 2018 |
|
137,405,901
|
4,045,199
|
|
|
|
| Compensation expense related to granting of restricted stock awards SHARES |
|
1,198,734
|
0
|
|
|
|
| Issuance of common stock related to an incentive plan SHARES |
|
60,386
|
|
|
|
|
| Exercise of stock options SHARES |
|
38,500
|
0
|
|
|
|
| Purchase of vested employee restricted stock units SHARES |
|
(176,275)
|
0
|
|
|
|
| Ending Balance SHARES at Jun. 30, 2018 |
|
138,527,246
|
4,045,199
|
|
|
|
| Opening Balance VALUE at Mar. 31, 2018 |
1,719,193
|
$ 1,374
|
$ 40
|
1,705,866
|
11,913
|
|
| NET INCOME (LOSS) |
2,441
|
0
|
0
|
0
|
2,441
|
|
| Compensation expense related to granting of restricted stock awards VALUE |
3,740
|
12
|
0
|
3,728
|
0
|
|
| Issuance of common stock related to an incentive plan VALUE |
388
|
1
|
0
|
387
|
0
|
|
| Exercise of stock options VALUE |
52
|
0
|
0
|
52
|
0
|
|
| Purchase of vested employee restricted stock units VALUE |
1,709
|
2
|
0
|
1,707
|
0
|
|
| Payments of dividends on common stock VALUE |
(12,746)
|
0
|
0
|
(12,746)
|
0
|
|
| Dividend equivalents, net of forfeitures |
127
|
0
|
0
|
127
|
0
|
|
| Net unrealized gain (loss) on derivatives VALUE |
0
|
|
|
|
|
|
| Ending Balance VALUE at Jun. 30, 2018 |
1,711,486
|
$ 1,385
|
$ 40
|
1,695,707
|
14,354
|
|
| Opening Balance SHARES at Dec. 31, 2018 |
|
137,180,213
|
4,045,199
|
|
|
|
| Compensation expense related to granting of stock options SHARES |
|
1,406,722
|
0
|
|
|
|
| Issuance of common stock related to an incentive plan SHARES |
|
84,958
|
0
|
|
|
|
| Exercise of stock options SHARES |
|
180,300
|
0
|
|
|
|
| Purchase of vested employee restricted stock units SHARES |
|
(204,499)
|
0
|
|
|
|
| Ending Balance SHARES at Mar. 31, 2019 |
|
138,647,694
|
4,045,199
|
|
|
|
| Opening Balance VALUE at Dec. 31, 2018 |
1,334,260
|
$ 1,372
|
$ 40
|
1,693,512
|
(360,664)
|
|
| NET INCOME (LOSS) |
3,125
|
0
|
0
|
0
|
3,125
|
|
| Compensation expense related to granting of stock options VALUE |
3,573
|
14
|
0
|
3,559
|
0
|
|
| Issuance of common stock related to an incentive plan VALUE |
379
|
1
|
0
|
378
|
0
|
|
| Exercise of stock options VALUE |
244
|
2
|
0
|
242
|
0
|
|
| Purchase of vested employee restricted stock units VALUE |
1,426
|
2
|
0
|
1,424
|
0
|
|
| Payments of dividends on common stock VALUE |
(12,913)
|
0
|
0
|
(12,913)
|
0
|
|
| Forfeitures of dividend equivalents VALUE |
(463)
|
0
|
0
|
(463)
|
0
|
|
| Application of amended leasing guidance |
4,719
|
0
|
0
|
0
|
4,719
|
|
| Ending Balance VALUE at Mar. 31, 2019 |
$ 1,331,498
|
$ 1,387
|
$ 40
|
1,682,891
|
(352,820)
|
$ 0
|
| Opening Balance SHARES at Dec. 31, 2018 |
|
137,180,213
|
4,045,199
|
|
|
|
| Compensation expense related to granting of stock options SHARES |
0
|
|
|
|
|
|
| Exercise of stock options SHARES |
180,300
|
|
|
|
|
|
| Ending Balance SHARES at Jun. 30, 2019 |
|
138,465,883
|
4,045,199
|
|
|
|
| Opening Balance VALUE at Dec. 31, 2018 |
$ 1,334,260
|
$ 1,372
|
$ 40
|
1,693,512
|
(360,664)
|
|
| NET INCOME (LOSS) |
29,116
|
|
|
|
|
|
| Purchase of vested employee restricted stock units VALUE |
2,726
|
|
|
|
|
|
| Net unrealized gain (loss) on derivatives VALUE |
(224)
|
|
|
|
|
|
| Ending Balance VALUE at Jun. 30, 2019 |
1,347,642
|
$ 1,386
|
$ 40
|
1,673,268
|
(326,828)
|
(224)
|
| Opening Balance SHARES at Mar. 31, 2019 |
|
138,647,694
|
4,045,199
|
|
|
|
| Compensation expense related to granting of stock options SHARES |
|
(38,774)
|
0
|
|
|
|
| Issuance of common stock related to an incentive plan SHARES |
|
73,791
|
0
|
|
|
|
| Purchase of vested employee restricted stock units SHARES |
|
(216,828)
|
0
|
|
|
|
| Ending Balance SHARES at Jun. 30, 2019 |
|
138,465,883
|
4,045,199
|
|
|
|
| Opening Balance VALUE at Mar. 31, 2019 |
1,331,498
|
$ 1,387
|
$ 40
|
1,682,891
|
(352,820)
|
0
|
| NET INCOME (LOSS) |
25,992
|
0
|
0
|
0
|
25,992
|
0
|
| Compensation expense related to granting of stock options VALUE |
3,393
|
0
|
0
|
3,393
|
0
|
0
|
| Issuance of common stock related to an incentive plan VALUE |
364
|
1
|
0
|
363
|
0
|
0
|
| Purchase of vested employee restricted stock units VALUE |
1,300
|
2
|
0
|
1,298
|
0
|
0
|
| Payments of dividends on common stock VALUE |
(13,140)
|
0
|
0
|
(13,140)
|
0
|
0
|
| Dividend equivalents, net of forfeitures |
1,059
|
0
|
0
|
1,059
|
0
|
0
|
| Net unrealized gain (loss) on derivatives VALUE |
(224)
|
0
|
0
|
0
|
0
|
(224)
|
| Ending Balance VALUE at Jun. 30, 2019 |
$ 1,347,642
|
$ 1,386
|
$ 40
|
$ 1,673,268
|
$ (326,828)
|
$ (224)
|