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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Shares of Common Stock (no par value) | Additional Paid in Capital | Retained Earnings | Accumulated Other Comprehensive Income (Loss)
--- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2016 |  | 48,935,000 |  |  |
Balance at Dec. 31, 2016 | $ 295,894 |  | $ 45,482 | $ 243,624 | $ 6,788
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 66,390 |  |  | 66,390 |
Other comprehensive gain (loss), net of tax | 1,442 |  |  |  | 1,442
Dividends declared | (12,809) |  |  | (12,809) |
Dividends reinvested in common stock (in shares) |  | 15,000 |  |  |
Dividends reinvested in common stock | 552 |  | 552 |  |
Stock based compensation (in shares) |  | 154,000 |  |  |
Stock based compensation | 4,184 |  | 4,184 |  |
Stock options exercised (in shares) |  | 363,000 |  |  |
Stock options exercised | 2,394 |  | 2,394 |  |
Common stock issued (in shares) |  | 1,000 |  |  |
Common stock issued | 21 |  | 21 |  |
Shares retired for settlement of employee taxes upon issuance of vested equity awards (in shares) |  | (216,000) |  |  |
Shares retired for settlement of employee taxes upon issuance of vested equity awards | (7,846) |  | (7,846) |  |
Common stock issued to acquire a non-controlling interests of nTelos (in shares) |  | 76,000 |  |  |
Common stock issued to acquire non-controlling interest in nTelos | 0 |  |  |  |
Balance (in shares) at Dec. 31, 2017 |  | 49,328,000 |  |  |
Balance at Dec. 31, 2017 | 350,222 |  | 44,787 | 297,205 | 8,230
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 46,595 |  |  | 46,595 |
Other comprehensive gain (loss), net of tax | 50 |  |  |  | 50
Dividends declared | (13,386) |  |  | (13,386) |
Dividends reinvested in common stock (in shares) |  | 11,000 |  |  |
Dividends reinvested in common stock | 520 |  | 520 |  |
Stock based compensation (in shares) |  | 206,000 |  |  |
Stock based compensation | 5,367 |  | 5,367 |  |
Stock options exercised (in shares) |  | 113,000 |  |  |
Stock options exercised | 787 |  | 787 |  |
Common stock issued (in shares) |  | 1,000 |  |  |
Common stock issued | 26 |  | 26 |  |
Shares retired for settlement of employee taxes upon issuance of vested equity awards (in shares) |  | (105,000) |  |  |
Shares retired for settlement of employee taxes upon issuance of vested equity awards | (4,031) |  | (4,031) |  |
Common stock issued to acquire a non-controlling interests of nTelos (in shares) |  | 76,000 |  |  |
Common stock issued to acquire non-controlling interest in nTelos | $ 0 |  |  |  |
Balance (in shares) at Dec. 31, 2018 | 49,630,000 | 49,630,000 |  |  |
Balance at Dec. 31, 2018 | $ 442,247 |  | 47,456 | 386,511 | 8,280
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |
Net income | 54,935 |  |  | 54,935 |
Other comprehensive gain (loss), net of tax | (7,972) |  |  |  | (7,972)
Dividends declared | (14,442) |  |  | (14,442) |
Dividends reinvested in common stock (in shares) |  | 14,000 |  |  |
Dividends reinvested in common stock | 499 |  | 499 |  |
Share repurchases (in shares) |  | (200,000) |  |  |
Share repurchases | (7,231) | $ (7,231) |  |  |
Stock based compensation (in shares) |  | 184,000 |  |  |
Stock based compensation | 4,182 |  | 4,182 |  |
Stock options exercised (in shares) |  | 29,000 |  |  |
Stock options exercised | 81 |  | 81 |  |
Common stock issued | 34 |  | 34 |  |
Shares retired for settlement of employee taxes upon issuance of vested equity awards (in shares) |  | (62,000) |  |  |
Shares retired for settlement of employee taxes upon issuance of vested equity awards | (2,911) |  | (2,911) |  |
Common stock issued to acquire a non-controlling interests of nTelos (in shares) |  | 76,000 |  |  |
Common stock issued to acquire non-controlling interest in nTelos | $ 0 |  |  |  |
Balance (in shares) at Dec. 31, 2019 | 49,671,000 | 49,671,000 |  |  |
Balance at Dec. 31, 2019 | $ 469,422 |  | $ 42,110 | $ 427,004 | $ 308

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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