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Consolidated Statements of Shareholders' Equity - USD ($) $ in Thousands | Total | Common Stock, Class B Common Stock and Preferred Stock | Paid-In Capital | Accumulated Other Comprehensive Loss | Retained Earnings | Treasury Stock | Non-controlling Interest
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at Dec. 31, 2014 | $ 1,132,039 | $ 20,689 | $ 580,564 | $ (23,747) | $ 420,879 | $ (114,425) | $ 248,079
Beginning balance (in shares) at Dec. 31, 2014 |  | 35,006,621 |  |  |  |  |
Net income | 226,524 |  |  |  | 172,929 |  | 53,595
Other comprehensive gain (loss) | (38,666) |  |  | (23,157) |  |  | (15,509)
Issuances of non-vested restricted shares of common stock (in shares) |  | 200,479 |  |  |  |  |
Issuances of non-vested restricted shares of common stock |  | $ 100 | (100) |  |  |  |
Forfeitures of non-vested restricted shares of common stock (in shares) |  | (5,000) |  |  |  |  |
Forfeitures of non-vested restricted shares of common stock |  | $ (2) | 2 |  |  |  |
Common stock contribution to 401(k) plan | 1,963 | $ 9 | 1,954 |  |  |  |
Common stock contribution to 401(k) plan (in shares) |  | 18,343 |  |  |  |  |
Stock issuances from exercise of stock options and employee stock purchase plan (in shares) |  | 124,262 |  |  |  |  |
Stock issuances from exercise of stock options and employee stock purchase plan | 8,632 | $ 62 | 8,570 |  |  |  |
Retirement of common stock (in shares) |  | (33,212) |  |  |  |  |
Retirement of common stock | (4,140) | $ (17) | (4,123) |  |  |  |
Share-based compensation | 13,233 |  | 13,233 |  |  |  |
Excess tax benefit from share-based compensation | 2,422 |  | 2,422 |  |  |  |
Cash dividends declared and paid on Common and Class B common stock | (98,532) |  |  |  | (98,532) |  |
Distributions to non-controlling interest | (39,754) |  |  |  |  |  | (39,754)
Ending balance at Dec. 31, 2015 | 1,203,721 | $ 20,841 | 602,522 | (46,904) | 495,276 | (114,425) | 246,411
Ending balance (in shares) at Dec. 31, 2015 |  | 35,311,493 |  |  |  |  |
Net income | 235,983 |  |  |  | 182,810 |  | 53,173
Other comprehensive gain (loss) | 5,583 |  |  | 3,374 |  |  | 2,209
Issuances of non-vested restricted shares of common stock (in shares) |  | 183,144 |  |  |  |  |
Issuances of non-vested restricted shares of common stock |  | $ 92 | (92) |  |  |  |
Forfeitures of non-vested restricted shares of common stock (in shares) |  | (26,000) |  |  |  |  |
Forfeitures of non-vested restricted shares of common stock |  | $ (13) | 13 |  |  |  |
Common stock contribution to 401(k) plan | 2,348 | $ 10 | 2,338 |  |  |  |
Common stock contribution to 401(k) plan (in shares) |  | 20,045 |  |  |  |  |
Stock issuances from exercise of stock options and employee stock purchase plan (in shares) |  | 72,482 |  |  |  |  |
Stock issuances from exercise of stock options and employee stock purchase plan | 5,696 | $ 36 | 5,660 |  |  |  |
Retirement of common stock (in shares) |  | (30,761) |  |  |  |  |
Retirement of common stock | (4,018) | $ (15) | (4,003) |  |  |  |
Share-based compensation | 11,848 |  | 11,848 |  |  |  |
Cash dividends declared and paid on Common and Class B common stock | (127,604) |  |  |  | (127,604) |  |
Decrease in non-controlling interest in Carrier Enterprise II | (42,909) |  | (25,936) |  |  |  | (16,973)
Distributions to non-controlling interest | (38,900) |  |  |  |  |  | (38,900)
Ending balance at Dec. 31, 2016 | 1,251,748 | $ 20,951 | 592,350 | (43,530) | 550,482 | (114,425) | 245,920
Ending balance (in shares) at Dec. 31, 2016 |  | 35,530,403 |  |  |  |  |
Net income | 257,290 |  |  |  | 208,221 |  | 49,069
Other comprehensive gain (loss) | 14,918 |  |  | 9,309 |  |  | 5,609
Issuances of non-vested restricted shares of common stock (in shares) |  | 176,899 |  |  |  |  |
Issuances of non-vested restricted shares of common stock |  | $ 88 | (88) |  |  |  |
Forfeitures of non-vested restricted shares of common stock (in shares) |  | (10,000) |  |  |  |  |
Forfeitures of non-vested restricted shares of common stock |  | $ (5) | 5 |  |  |  |
Common stock contribution to 401(k) plan | 2,428 | $ 8 | 2,420 |  |  |  |
Common stock contribution to 401(k) plan (in shares) |  | 16,389 |  |  |  |  |
Stock issuances from exercise of stock options and employee stock purchase plan (in shares) |  | 49,166 |  |  |  |  |
Stock issuances from exercise of stock options and employee stock purchase plan | 5,287 | $ 24 | 5,263 |  |  |  |
Retirement of common stock (in shares) |  | (32,804) |  |  |  |  |
Retirement of common stock | (4,717) | $ (16) | (4,701) |  |  |  |
Share-based compensation | 13,536 |  | 13,536 |  |  |  |
Net proceeds from the sale of Common stock | 247,433 |  | 220,448 |  |  | 26,985 |
Net proceeds from the sale of Common stock (in shares) |  | 1,498,662 |  |  |  |  |
Cash dividends declared and paid on Common and Class B common stock | (164,147) |  |  |  | (164,147) |  |
Investment in unconsolidated entity | 12,720 |  |  |  |  |  | 12,720
Decrease in non-controlling interest in Carrier Enterprise II | (42,688) |  | (25,225) |  |  |  | (17,463)
Distributions to non-controlling interest | (42,831) |  |  |  |  |  | (42,831)
Ending balance at Dec. 31, 2017 | $ 1,550,977 | $ 21,050 | $ 804,008 | $ (34,221) | $ 594,556 | $ (87,440) | $ 253,024
Ending balance (in shares) at Dec. 31, 2017 |  | 37,228,715 |  |  |  |  |

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