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v3.10.0.1

Consolidated Statement of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-in Capital | Accumulated Deficit | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2016 | $ 1,458,963 | $ 1,176 | $ 1,780,350 | $ (322,563) |
Balance (in shares) at Dec. 31, 2016 |  | 117,554 |  |  |
Comprehensive income |  |  |  |  |
Net income | 50,047 |  |  | 50,047 |
Retirement of common stock | (5,089) | $ (2) | (5,087) |  |
Retirement of common stock (in shares) |  | (153) |  |  |
Dividends declared on common stock | (50,036) |  |  | (50,036) |
Restricted stock compensation, net of forfeitures | 4,086 |  | 4,086 |  |
Restricted stock grants |  | $ 5 | (5) |  |
Restricted stock grants (in shares) |  | 506 |  |  |
Stock options exercised | 5,190 | $ 2 | 5,188 |  |
Stock options exercised (in shares) |  | 233 |  |  |
Balance at Mar. 31, 2017 | 1,463,161 | $ 1,181 | 1,784,532 | (322,552) |
Balance (in shares) at Mar. 31, 2017 |  | 118,140 |  |  |
Balance at Dec. 31, 2016 | 1,458,963 | $ 1,176 | 1,780,350 | (322,563) |
Balance (in shares) at Dec. 31, 2016 |  | 117,554 |  |  |
Comprehensive income |  |  |  |  |
Net income | 136,700 |  |  |  |
Balance at Sep. 30, 2017 | 1,458,681 | $ 1,182 | 1,793,568 | (336,069) |
Balance (in shares) at Sep. 30, 2017 |  | 118,191 |  |  |
Balance at Mar. 31, 2017 | 1,463,161 | $ 1,181 | 1,784,532 | (322,552) |
Balance (in shares) at Mar. 31, 2017 |  | 118,140 |  |  |
Comprehensive income |  |  |  |  |
Net income | 45,475 |  |  | 45,475 |
Retirement of common stock | (729) |  | (729) |  |
Retirement of common stock (in shares) |  | (22) |  |  |
Dividends declared on common stock | (50,098) |  |  | (50,098) |
Restricted stock compensation, net of forfeitures | 4,059 |  | 4,059 |  |
Restricted stock grants (in shares) |  | 1 |  |  |
Stock options exercised | 1,476 | $ 1 | 1,475 |  |
Stock options exercised (in shares) |  | 60 |  |  |
Balance at Jun. 30, 2017 | 1,463,344 | $ 1,182 | 1,789,337 | (327,175) |
Balance (in shares) at Jun. 30, 2017 |  | 118,179 |  |  |
Comprehensive income |  |  |  |  |
Net income | 41,178 |  |  | 41,178 |
Dividends declared on common stock | (50,072) |  |  | (50,072) |
Restricted stock compensation, net of forfeitures | 4,058 |  | 4,058 |  |
Restricted stock grants (in shares) |  | 2 |  |  |
Stock options exercised | 173 |  | 173 |  |
Stock options exercised (in shares) |  | 10 |  |  |
Balance at Sep. 30, 2017 | 1,458,681 | $ 1,182 | 1,793,568 | (336,069) |
Balance (in shares) at Sep. 30, 2017 |  | 118,191 |  |  |
Balance at Dec. 31, 2017 | 1,451,608 | $ 1,182 | 1,794,713 | (344,287) |
Balance (in shares) at Dec. 31, 2017 |  | 118,204 |  |  |
Comprehensive income |  |  |  |  |
Net income | 37,777 |  |  | 37,777 |
Change in fair value of interest rate swap, net of tax | (2,028) |  |  |  | (2,028)
Total comprehensive income | 35,749 |  |  | 37,777 | (2,028)
Retirement of common stock | (2,525) | $ (1) | (2,524) |  |
Retirement of common stock (in shares) |  | (117) |  |  |
Dividends declared on common stock | (51,533) |  |  | (51,533) |
Restricted stock compensation, net of forfeitures | 3,486 |  | 3,486 |  |
Restricted stock compensation, net of forfeitures (in shares) |  |  |  |  |
Restricted stock grants |  | $ 4 | (4) |  |
Restricted stock grants (in shares) |  | 457 |  |  |
Cumulative effect of adoption of new accounting standard | (2,575) |  |  | (2,575) |
Balance at Mar. 31, 2018 | 1,434,210 | $ 1,185 | 1,795,671 | (360,618) | (2,028)
Balance (in shares) at Mar. 31, 2018 |  | 118,544 |  |  |
Balance at Dec. 31, 2017 | 1,451,608 | $ 1,182 | 1,794,713 | (344,287) |
Balance (in shares) at Dec. 31, 2017 |  | 118,204 |  |  |
Comprehensive income |  |  |  |  |
Net income | 117,968 |  |  |  |
Balance at Sep. 30, 2018 | 1,422,075 | $ 1,187 | 1,803,903 | (383,015) |
Balance (in shares) at Sep. 30, 2018 |  | 118,670 |  |  |
Balance at Mar. 31, 2018 | 1,434,210 | $ 1,185 | 1,795,671 | (360,618) | (2,028)
Balance (in shares) at Mar. 31, 2018 |  | 118,544 |  |  |
Comprehensive income |  |  |  |  |
Net income | 39,197 |  |  | 39,197 |
Change in fair value of interest rate swap, net of tax | 2,028 |  |  |  | 2,028
Total comprehensive income | 41,225 |  |  | 39,197 | 2,028
Retirement of common stock | (19) |  | (19) |  |
Retirement of common stock (in shares) |  | (1) |  |  |
Dividends declared on common stock | (51,478) |  |  | (51,478) |
Restricted stock compensation, net of forfeitures | 3,980 |  | 3,980 |  |
Restricted stock compensation, net of forfeitures (in shares) |  |  |  |  |
Restricted stock grants |  |  |  |  |
Restricted stock grants (in shares) |  | 5 |  |  |
Balance at Jun. 30, 2018 | 1,427,918 | $ 1,185 | 1,799,632 | (372,899) |
Balance (in shares) at Jun. 30, 2018 |  | 118,548 |  |  |
Comprehensive income |  |  |  |  |
Net income | 40,994 | $ 0 | 0 | 40,994 | 0
Dividends declared on common stock | (51,110) | 0 | 0 | (51,110) | 0
Restricted stock compensation, net of forfeitures | 2,292 | $ 0 | 2,292 | 0 | 0
Restricted stock compensation, net of forfeitures (in shares) |  | 0 |  |  |
Stock options exercised | 1,981 | $ 2 | 1,979 | 0 | 0
Stock options exercised (in shares) |  | 122 |  |  |
Balance at Sep. 30, 2018 | $ 1,422,075 | $ 1,187 | $ 1,803,903 | $ (383,015) |
Balance (in shares) at Sep. 30, 2018 |  | 118,670 |  |  |

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(31)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(30)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
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Period Type: | instant