Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Thousands | Total | COMMON STOCK | CAPITAL SURPLUS | ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) | RETAINED EARNINGS |
Balance at beginning of period (in shares) at Dec. 31, 2017 | | 124,261 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock (in shares) | | 523 | | | |
Repurchases of common stock (in shares) | | (3,409) | | | |
Balance at end of period (in shares) at Sep. 30, 2018 | | 121,375 | | | |
Balance at beginning of period at Dec. 31, 2017 | | $ 124 | $ 1,064,601 | $ 3,507 | $ 37,033 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock | | 1 | (1) | | |
Repurchases of common stock | | (4) | | | (223,440) |
Stock-based compensation expense | | | 33,000 | | |
Foreign currency translation adjustments, net of tax | $ (13,299) | | | (13,299) | |
Net income | 320,724 | | | | 320,724 |
Cash dividends ($.31 per share, $.28 per share, $.93 per share, and $.84 per share) | | | | | (103,004) |
Balance at end of period at Sep. 30, 2018 | | $ 121 | 1,097,600 | (9,792) | 31,313 |
Balance at beginning of period (in shares) at Jun. 30, 2018 | | 122,445 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock (in shares) | | (2) | | | |
Repurchases of common stock (in shares) | | (1,068) | | | |
Balance at end of period (in shares) at Sep. 30, 2018 | | 121,375 | | | |
Balance at beginning of period at Jun. 30, 2018 | | $ 122 | 1,086,545 | (6,409) | 29,240 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock | | 0 | 0 | | |
Repurchases of common stock | | (1) | | | (78,958) |
Stock-based compensation expense | | | 11,055 | | |
Foreign currency translation adjustments, net of tax | (3,383) | | | (3,383) | |
Net income | 115,242 | | | | 115,242 |
Cash dividends ($.31 per share, $.28 per share, $.93 per share, and $.84 per share) | | | | | (34,211) |
Balance at end of period at Sep. 30, 2018 | | $ 121 | 1,097,600 | (9,792) | 31,313 |
Balance at beginning of period (in shares) at Dec. 31, 2018 | | 119,078 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock (in shares) | | 549 | | | |
Repurchases of common stock (in shares) | | (3,530) | | | |
Balance at end of period (in shares) at Sep. 30, 2019 | | 116,097 | | | |
Balance at beginning of period at Dec. 31, 2018 | 1,063,198 | $ 119 | 1,079,188 | (16,109) | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock | | 1 | (1) | | |
Repurchases of common stock | | (4) | | | (208,166) |
Stock-based compensation expense | | | 34,803 | | |
Foreign currency translation adjustments, net of tax | (9,762) | | | (9,762) | |
Net income | 341,591 | | | | 341,591 |
Cash dividends ($.31 per share, $.28 per share, $.93 per share, and $.84 per share) | | | | | (109,830) |
Balance at end of period at Sep. 30, 2019 | 1,111,830 | $ 116 | 1,113,990 | (25,871) | 23,595 |
Balance at beginning of period (in shares) at Jun. 30, 2019 | | 117,561 | | | |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock (in shares) | | (3) | | | |
Repurchases of common stock (in shares) | | (1,461) | | | |
Balance at end of period (in shares) at Sep. 30, 2019 | | 116,097 | | | |
Balance at beginning of period at Jun. 30, 2019 | | $ 118 | 1,102,101 | (15,860) | 22,868 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] | | | | | |
Net issuances of restricted stock | | 0 | 0 | | |
Repurchases of common stock | | (2) | | | (80,219) |
Stock-based compensation expense | | | 11,889 | | |
Foreign currency translation adjustments, net of tax | (10,011) | | | (10,011) | |
Net income | 117,181 | | | | 117,181 |
Cash dividends ($.31 per share, $.28 per share, $.93 per share, and $.84 per share) | | | | | (36,235) |
Balance at end of period at Sep. 30, 2019 | $ 1,111,830 | $ 116 | $ 1,113,990 | $ (25,871) | $ 23,595 |