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v3.20.4

Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands | Total | Common Stock | Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss) | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
BALANCE at Dec. 31, 2017 | $ 1,184,782 | $ 805 | $ 102,563 | $ 1,267,871 | $ (15,835) | $ (170,622)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive income | 167,910 | 0 | 0 | 168,148 | (238) | 0
Purchases of common stock | (72,165) | 0 | 0 | 0 | 0 | (72,165)
Dividends on common stock | (24,284) | 0 | 0 | (24,284) | 0 | 0
Equity compensation activity, including excess tax benefits | (895) | 0 | (2,502) | 0 | 0 | 1,607
Non-cash equity compensation expense | 7,394 | 0 | 7,394 | 0 | 0 | 0
Cumulative effect of accounting change | 2,011 | 0 | 0 | 2,011 | 0 | 0
BALANCE at Dec. 31, 2018 | 1,264,753 | 805 | 107,455 | 1,413,746 | (16,073) | (241,180)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive income | 168,289 | 0 | 0 | 166,944 | 1,345 | 0
Purchases of common stock | (42,301) | 0 | 0 | 0 | 0 | (42,301)
Dividends on common stock | (286,082) | 0 | 0 | (286,082) | 0 | 0
Equity compensation activity, including excess tax benefits | (1,728) | 0 | (2,883) | 0 | 0 | 1,155
Non-cash equity compensation expense | 8,077 | 0 | 8,077 | 0 | 0 | 0
BALANCE at Dec. 31, 2019 | 1,111,008 | 805 | 112,649 | 1,294,608 | (14,728) | (282,326)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Comprehensive income | 160,973 | 0 | 0 | 169,078 | (8,105) | 0
Purchases of common stock | (56,521) | 0 | 0 | 0 | 0 | (56,521)
Dividends on common stock | (24,770) | 0 | 0 | (24,770) | 0 | 0
Equity compensation activity, including excess tax benefits | (4,553) | 0 | (5,513) | 0 | 0 | 960
Non-cash equity compensation expense | 8,903 | 0 | 8,903 | 0 | 0 | 0
BALANCE at Dec. 31, 2020 | $ 1,195,040 | $ 805 | $ 116,039 | $ 1,438,916 | $ (22,833) | $ (337,887)

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- Definition Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(22)) -URI http://asc.fasb.org/extlink&oid=120400993&loc=SL114874131-224263 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(24)) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121641772&loc=d3e557-108580 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(26)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1B -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669625-108580 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1A -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121641772&loc=SL7669619-108580 + Details
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