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Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Common Stock Held in Treasury, at Cost [Member] | Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2015 | $ 1,958,346 | $ 1,478,439 | $ 15,215 | $ 0 | $ 450 | $ 190,813 | $ (118) | $ 273,547
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Total comprehensive income | 20,112 | 74,843 | (54,205) |  |  |  |  | (526)
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2014-13 [Member] | 0 | 6,442 |  |  |  |  |  | (6,442)
Stock-based compensation | 5,253 |  |  |  |  | 5,253 |  |
Cost of shares (acquired) issued under equity plan | (505) | (127) |  |  |  |  | (378) |
Payments for Repurchase of Warrants | (2,717) | (1,916) |  |  |  | (801) |  |
Stock Issued During Period, Value, New Issues | 2 |  |  |  | 2 | 0 |  |
Noncontrolling Interest, Decrease from Deconsolidation | (2,469) |  |  |  |  |  |  | (2,469)
Proceeds from Warrant Exercises | 2 |  |  |  | 0 | 2 |  |
Ending balance at Dec. 31, 2016 | 1,978,024 | 1,557,681 | (38,990) | 0 | 452 | 195,267 | (496) | 264,110
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Total comprehensive income | (335,376) | (328,715) | (6,661) |  |  |  |  | 0
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2018-02 [Domain] |  |  | (6,588) |  |  |  |  |
Stock-based compensation | 4,293 |  |  |  |  | 4,293 |  |
Cost of shares (acquired) issued under equity plan | (1,547) | (1,572) |  |  |  |  | 25 |
Stock Issued During Period, Value, New Issues | 1 | 0 | 0 | 0 | 1 | 0 |  |
Proceeds from Warrant Exercises | 0 |  |  |  |  |  |  |
Ending balance at Dec. 31, 2017 | 1,645,258 | 1,233,845 | (52,239) | 0 | 453 | 199,560 | (471) | 264,110
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Total comprehensive income | 273,823 | 267,399 | 6,424 |  |  |  |  | 0
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification | Accounting Standards Update 2016-01 [Member] |  | 2,900 | (2,900) |  |  |  |  |
Stock-based compensation | 11,854 |  |  |  |  | 11,854 |  |
Cost of shares (acquired) issued under equity plan | (1,158) | (1,156) |  |  |  |  | (2) |
Stock Issued During Period, Value, New Issues | 1 | 0 | 0 |  | 1 | 0 |  |
Proceeds from Warrant Exercises | 3 |  |  |  | 0 | 3 | 0 |
Ending balance at Dec. 31, 2018 | 1,633,147 | 1,421,302 | $ (48,715) | $ 0 | $ 454 | 219,429 | $ (473) | 41,150
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
AMPS Impact on Stockholders Equity | $ (296,634) | $ (81,686) |  |  |  | $ 8,012 |  | $ (222,960)

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