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Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands | Director [Member] Preferred Stock [Member] | Director [Member] Common Stock [Member] | Director [Member] Additional Paid-in Capital [Member] | Director [Member] Retained Earnings [Member] | Director [Member] AOCI Attributable to Parent [Member] | Director [Member] Treasury Stock [Member] | Director [Member] | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Treasury Stock [Member] | Total
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Dec. 31, 2018 |  |  |  |  |  |  |  | $ 39 | $ 121,956 | $ 1,880,481 | $ (248,308) | $ (42,469) | $ (20,736) | $ 1,690,963
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (91,581) |  |  | (91,581)
Restricted stock units granted |  |  |  |  |  |  |  |  |  | 4,303 |  |  |  | 4,303
Common stock dividends declared |  |  |  |  |  |  |  |  |  |  | (3,655) |  |  | (3,655)
Series B Preferred Stock dividends declared |  |  |  |  |  |  |  |  |  |  | (414) |  |  | (414)
Common stock issued for 401(k) match |  |  |  |  |  |  |  |  | 327 | 2,425 |  |  |  | 2,752
Common stock issued to pension plans |  |  |  |  |  |  |  | 0 | 597 | 3,003 | 0 | 0 | 0 | 3,600
Common stock issued for incentive compensation |  |  |  |  |  |  |  | 0 | 899 | 7,375 | 0 | 0 | (1,603) | 6,671
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  | 4,511 |  | 4,511
Restricted stock units distributed |  |  |  |  |  |  |  | 0 | 291 | (291) | 0 | 0 | (636) | (636)
Balance at Sep. 30, 2019 |  |  |  |  |  |  |  | 39 | 124,133 | 1,897,363 | (343,958) | (37,958) | (22,975) | 1,616,644
Adjustment to fair value of warrants issued for purchase of another company |  |  |  |  |  |  |  | 0 | 0 | (325) | 0 | 0 | 0 | (325)
Common stock issued to directors (253,000 shares) |  |  |  |  |  |  |  | 0 | 63 | 392 | 0 | 0 | 0 | 455
Balance at Jun. 30, 2019 |  |  |  |  |  |  |  | 39 | 123,701 | 1,895,617 | (323,079) | (34,670) | (22,380) | 1,639,228
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (19,516) |  |  | (19,516)
Restricted stock units granted |  |  |  |  |  |  |  |  |  | 1,206 |  |  |  | 1,206
Common stock dividends declared |  |  |  |  |  |  |  |  |  |  | (1,225) |  |  | (1,225)
Series B Preferred Stock dividends declared |  |  |  |  |  |  |  |  |  |  | (138) |  |  | (138)
Common stock issued for 401(k) match |  |  |  |  |  |  |  |  | 141 | 831 |  |  |  | 972
Other comprehensive income (loss) |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 | (3,288) | 0 | (3,288)
Restricted stock units distributed |  |  |  |  |  |  |  | 0 | 291 | (291) | 0 | 0 | (595) | (595)
Balance at Sep. 30, 2019 |  |  |  |  |  |  |  | 39 | 124,133 | 1,897,363 | (343,958) | (37,958) | (22,975) | 1,616,644
Balance at Dec. 31, 2019 |  |  |  |  |  |  |  | 39 | 132,292 | 1,973,700 | (353,331) | (37,310) | (22,967) | 1,692,423
Net income (loss) |  |  |  |  |  |  |  |  |  |  | (17,585) |  |  | (17,585)
Restricted stock units granted |  |  |  |  |  |  |  |  |  | 3,746 |  |  |  | 3,746
Common stock dividends declared |  |  |  |  |  |  |  |  |  |  | (3,951) |  |  | (3,951)
Series B Preferred Stock dividends declared |  |  |  |  |  |  |  |  |  |  | (414) |  |  | (414)
Common stock issued for 401(k) match |  |  |  |  |  |  |  |  | 350 | 3,295 |  |  |  | 3,645
Common stock issued to pension plans |  |  |  |  |  |  |  | 0 | 555 | 12,226 | 0 | 0 | 0 | 12,781
Common stock issued for incentive compensation | $ 0 | $ 98 | $ 1,385 | $ 0 | $ 0 | $ 0 | $ 1,483 | 0 | 700 | 4,396 | 0 | 0 | (1,266) | 3,830
Other comprehensive income (loss) |  |  |  |  |  |  |  | 0 | 0 | 0 | 0 | (2,801) | 0 | (2,801)
Restricted stock units distributed |  |  |  |  |  |  |  | 0 | 426 | (426) | 0 | 0 | (1,479) | (1,479)
Balance at Sep. 30, 2020 |  |  |  |  |  |  |  | 39 | 134,421 | 1,998,322 | (375,527) | (40,111) | (23,496) | 1,693,648
Treasury shares issued to charitable foundation |  |  |  |  |  |  |  | 0 | 0 | 0 | (246) | 0 | 2,216 | 1,970
Balance at Jun. 30, 2020 |  |  |  |  |  |  |  | 39 | 133,699 | 1,982,400 | (387,688) | (46,261) | (23,496) | 1,658,693
Net income (loss) |  |  |  |  |  |  |  | 0 | 0 | 0 | 13,628 | 0 | 0 | 13,628
Restricted stock units granted |  |  |  |  |  |  |  |  |  | 1,317 |  |  |  | 1,317
Common stock dividends declared |  |  |  |  |  |  |  |  |  |  | (1,329) |  |  | (1,329)
Series B Preferred Stock dividends declared |  |  |  |  |  |  |  |  |  |  | (138) |  |  | (138)
Common stock issued for 401(k) match |  |  |  |  |  |  |  |  | 110 | 1,303 |  |  |  | 1,413
Common stock issued to pension plans |  |  |  |  |  |  |  | 0 | 514 | 11,917 | 0 | 0 | 0 | 12,431
Common stock issued for incentive compensation | $ 0 | $ 98 | $ 1,385 | $ 0 | $ 0 | $ 0 | $ 1,483 |  |  |  |  |  |  |
Other comprehensive income (loss) |  |  |  |  |  |  |  |  |  |  |  | 6,150 |  | 6,150
Balance at Sep. 30, 2020 |  |  |  |  |  |  |  | $ 39 | $ 134,421 | $ 1,998,322 | $ (375,527) | $ (40,111) | $ (23,496) | $ 1,693,648

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- Definition In cases when treasury stock is reissued at a price lower than the cost to repurchase, the excess difference between the selling price and cost to repurchase is charged against retained earnings (assuming that all APIC arising from treasury stock transactions has first been exhausted). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 30 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=64906022&loc=d3e23086-112654 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=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770 + Details
Name: | us-gaap_TreasuryStockReissuedAtLowerThanRepurchasePrice
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration