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v3.10.0.1

Consolidated Statement of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands | Total | Common Stock | Additional Paid-In Capital | Retained Earnings | Accumulated Other Comprehensive Loss | Treasury Stock
--- | --- | --- | --- | --- | --- | ---
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption | $ 0 |  | $ (254) | $ 254 | $ 0 |
Balance, shares at Dec. 31, 2016 |  | 32,085 |  |  |  | 530
Balance, value at Dec. 31, 2016 | 460,880 | $ 320 | 264,418 | 211,748 | (7,721) | $ (7,885)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 3,996 |  |  |  |  |
Foreign currency translation adjustment | 679 |  |  |  | 679 |
Adjustment to retirement benefit liability, net of taxes of $(2) | (3) |  |  |  | (3) |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 29 |  |  |  | 29 |
Stock compensation expense | 1,635 |  | 1,635 |  |  |
Stock options exercised, shares |  | 1 |  |  |  |
Stock options exercised | 11 | $ 0 | 11 |  |  |
Issuance of restricted stock | 0 |  |  |  |  |
Net settlement of restricted stock units, shares |  | 47 |  |  |  | 22
Net settlement of restricted stock units | (922) | $ 1 | (1) |  |  | $ (922)
Balance, shares at Mar. 31, 2017 |  | 32,133 |  |  |  | 552
Balance, value at Mar. 31, 2017 | 466,305 | $ 321 | 265,809 | 215,998 | (7,016) | $ (8,807)
Balance, shares at Dec. 31, 2016 |  | 32,085 |  |  |  | 530
Balance, value at Dec. 31, 2016 | 460,880 | $ 320 | 264,418 | 211,748 | (7,721) | $ (7,885)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 37,384 |  |  |  |  |
Foreign currency translation adjustment | 3,351 |  |  |  |  |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 88 |  |  |  |  |
Balance, shares at Sep. 30, 2017 |  | 32,275 |  |  |  | 588
Balance, value at Sep. 30, 2017 | 505,431 | $ 322 | 269,880 | 249,386 | (4,290) | $ (9,867)
Balance, shares at Mar. 31, 2017 |  | 32,133 |  |  |  | 552
Balance, value at Mar. 31, 2017 | 466,305 | $ 321 | 265,809 | 215,998 | (7,016) | $ (8,807)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 12,769 |  |  |  |  |
Foreign currency translation adjustment | 1,091 |  |  |  | 1,091 |
Adjustment to retirement benefit liability, net of taxes of $(2) | (3) |  |  |  | (3) |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 30 |  |  |  | 30 |
Stock compensation expense | 1,556 |  | 1,556 |  |  |
Stock options exercised, shares |  | 15 |  |  |  |
Stock options exercised | 236 | $ 0 | 236 |  |  |
Issuance of restricted stock (in shares) |  | 2 |  |  |  |
Issuance of restricted stock | 0 |  |  |  |  |
Net settlement of restricted stock units, shares |  | 5 |  |  |  | 2
Net settlement of restricted stock units | (81) | $ 0 | 0 |  |  | $ (81)
Balance, shares at Jun. 30, 2017 |  | 32,155 |  |  |  | 554
Balance, value at Jun. 30, 2017 | 481,903 | $ 321 | 267,601 | 228,767 | (5,898) | $ (8,888)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 20,619 |  |  |  |  |
Foreign currency translation adjustment | 1,581 |  |  |  | 1,581 |
Adjustment to retirement benefit liability, net of taxes of $(2) | (2) |  |  |  | (2) |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 29 |  |  |  | 29 |
Stock compensation expense | 1,878 |  | 1,878 |  |  |
Stock options exercised, shares |  | 24 |  |  |  |
Stock options exercised | 402 | $ 0 | 402 |  |  |
Issuance of restricted stock | 0 |  |  |  |  |
Net settlement of restricted stock units, shares |  | 96 |  |  |  | 34
Net settlement of restricted stock units | (979) | $ 1 | (1) |  |  | $ (979)
Balance, shares at Sep. 30, 2017 |  | 32,275 |  |  |  | 588
Balance, value at Sep. 30, 2017 | 505,431 | $ 322 | 269,880 | 249,386 | (4,290) | $ (9,867)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Cumulative effect of new accounting principle in period of adoption | 274 |  | 0 | 624 | (350) |
Balance, shares at Dec. 31, 2017 |  | 32,332 |  |  |  | 615
Balance, value at Dec. 31, 2017 | 531,719 | $ 323 | 271,957 | 274,562 | (4,366) | $ (10,757)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 8,352 |  |  |  |  |
Foreign currency translation adjustment | 110 |  |  |  | 110 |
Adjustment to retirement benefit liability, net of taxes of $(2) | (5) |  |  |  | (5) |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 32 |  |  |  | 32 |
Stock compensation expense | 2,097 |  | 2,097 |  |  |
Stock options exercised, shares |  | 13 |  |  |  |
Stock options exercised | 226 | $ 0 | 226 |  |  |
Net settlement of restricted stock units, shares |  | 53 |  |  |  | 24
Net settlement of restricted stock units | (850) | $ 1 | (1) |  |  | $ (850)
Balance, shares at Mar. 31, 2018 |  | 32,398 |  |  |  | 639
Balance, value at Mar. 31, 2018 | 541,955 | $ 324 | 274,279 | 283,538 | (4,579) | $ (11,607)
Balance, shares at Dec. 31, 2017 |  | 32,332 |  |  |  | 615
Balance, value at Dec. 31, 2017 | 531,719 | $ 323 | 271,957 | 274,562 | (4,366) | $ (10,757)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 50,692 |  |  |  |  |
Foreign currency translation adjustment | (1,538) |  |  |  |  |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 95 |  |  |  |  |
Balance, shares at Sep. 30, 2018 |  | 32,842 |  |  |  | 778
Balance, value at Sep. 30, 2018 | 582,875 | $ 328 | 280,149 | 325,878 | (6,174) | $ (17,306)
Balance, shares at Mar. 31, 2018 |  | 32,398 |  |  |  | 639
Balance, value at Mar. 31, 2018 | 541,955 | $ 324 | 274,279 | 283,538 | (4,579) | $ (11,607)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 22,837 |  |  |  |  |
Foreign currency translation adjustment | (1,787) |  |  |  | (1,787) |
Adjustment to retirement benefit liability, net of taxes of $(2) | (5) |  |  |  | (5) |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 31 |  |  |  | 31 |
Stock compensation expense | 2,731 |  | 2,731 |  |  |
Stock options exercised, shares |  | 21 |  |  |  |
Stock options exercised | 300 | $ 0 | 300 |  |  |
Issuance of restricted stock (in shares) |  | 2 |  |  |  |
Issuance of restricted stock | 0 |  |  |  |  |
Net settlement of restricted stock units, shares |  | 334 |  |  |  | 128
Net settlement of restricted stock units | (5,166) | $ 3 | (3) |  |  | $ (5,166)
Balance, shares at Jun. 30, 2018 |  | 32,755 |  |  |  | 767
Balance, value at Jun. 30, 2018 | 560,896 | $ 327 | 277,307 | 306,375 | (6,340) | $ (16,773)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Net income | 19,503 |  |  |  |  |
Foreign currency translation adjustment | 139 |  |  |  | 139 |
Adjustment to retirement benefit liability, net of taxes of $(2) | (5) |  |  |  | (5) |
Adjustment to post employment health care benefit liability, net of taxes of $12 | 32 |  |  |  | 32 |
Stock compensation expense | 2,026 |  | 2,026 |  |  |
Stock options exercised, shares |  | 50 |  |  |  |
Stock options exercised | 817 | $ 1 | 816 |  |  |
Net settlement of restricted stock units, shares |  | 37 |  |  |  | 11
Net settlement of restricted stock units | (533) | $ 0 | 0 |  |  | $ (533)
Balance, shares at Sep. 30, 2018 |  | 32,842 |  |  |  | 778
Balance, value at Sep. 30, 2018 | $ 582,875 | $ 328 | $ 280,149 | $ 325,878 | $ (6,174) | $ (17,306)

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