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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Common Stock [Member] | Additional Paid-in Capital [Member] | Retained Earnings [Member] | AOCI Attributable to Parent [Member] | Noncontrolling Interest [Member] | Total
--- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Dec. 31, 2017 | 38,934,161 |  |  |  |  |
Balance at Dec. 31, 2017 | $ 406,984 | $ 50,219 | $ (115,489) | $ (43,157) | $ 4,457 | $ 303,014
Net earnings |  |  | 128,574 |  |  | 128,574
Pension liability adjustments, net of tax |  |  |  | 1,638 |  | 1,638
Foreign currency translation loss |  |  |  | (13,087) |  | (13,087)
Unrealized (loss) / gain on interest rate swaps, net of tax |  |  |  | 129 |  | 129
Other comprehensive loss attributable to NCI |  |  |  | (6,741) | (60) | (6,801)
NCI share of earnings |  |  | (23,207) |  | 2,717 | (20,490)
NCI redemption increment |  |  | (7,709) |  |  | (7,709)
Distributions to NCI |  |  |  |  | (2,474) | (2,474)
Acquisitions of businesses, net |  |  |  |  | (220) | (220)
Subsidiaries’ equity transactions |  | (496) |  |  |  | (496)
Stock option expense |  | 6,394 |  |  |  | $ 6,394
Stock options exercised (in shares) | 278,975 |  |  |  |  | 278,975
Stock options exercised | $ 8,821 | (1,400) |  |  |  | $ 7,421
Dividends |  |  | (3,920) |  |  | (3,920)
Balance (in shares) at Dec. 31, 2018 | 39,213,136 |  |  |  |  |
Balance at Dec. 31, 2018 | $ 415,805 | 54,717 | (21,751) | (61,218) | 4,420 | 391,973
Net earnings |  |  | 137,585 |  |  | 137,585
Pension liability adjustments, net of tax |  |  |  | (811) |  | (811)
Foreign currency translation loss |  |  |  | (185) |  | (185)
Unrealized (loss) / gain on interest rate swaps, net of tax |  |  |  | (4,073) |  | (4,073)
Other comprehensive loss attributable to NCI |  |  |  | (877) | 233 | (644)
NCI share of earnings |  |  | (26,829) |  | 2,270 | (24,559)
NCI redemption increment |  |  | (7,853) |  |  | (7,853)
Distributions to NCI |  |  |  |  | (2,305) | (2,305)
Acquisitions of businesses, net |  |  |  |  | (195) | (195)
Subsidiaries’ equity transactions |  | 2,567 |  |  |  | 2,567
Stock option expense |  | 7,831 |  |  |  | $ 7,831
Stock options exercised (in shares) | 632,075 |  |  |  |  | 632,075
Stock options exercised | $ 26,348 | (4,409) |  |  |  | $ 21,939
Dividends |  |  | (3,971) |  |  | (3,971)
Balance (in shares) at Dec. 31, 2019 | 39,845,211 |  |  |  |  |
Balance at Dec. 31, 2019 | $ 442,153 | $ 60,706 | $ 77,181 | $ (67,164) | $ 4,423 | $ 517,299

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