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CONSOLIDATED STATEMENTS OF EQUITY Statement - USD ($) shares in Thousands, $ in Thousands | Total | Common Class C, Non-Voting [Member] | Preferred Stock [Member] | Preferred Stock [Member] Common Class C, Non-Voting [Member] | Common Stock [Member] | Common Stock [Member] Common Class C, Non-Voting [Member] | Additional Paid-in Capital [Member] | Additional Paid-in Capital [Member] Common Class C, Non-Voting [Member] | Accumulated Other Comprehensive Income (Loss) [Member] | Accumulated Other Comprehensive Income (Loss) [Member] Common Class C, Non-Voting [Member] | Retained Earnings [Member] | Retained Earnings [Member] Common Class C, Non-Voting [Member] | Noncontrolling Interest [Member] | Noncontrolling Interest [Member] Common Class C, Non-Voting [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning Balance (Shares Outstanding) at Dec. 31, 2016 |  |  | 8,400 |  | 10,539 |  |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2016 | $ (643,647) |  | $ (204,759) |  | $ (10,539) |  | $ (118,655) |  | $ (33,758) |  | $ (275,714) |  | $ (222) |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | 64,476 |  | 0 |  | 0 |  | 0 |  | 0 |  | 64,476 |  | 0 |
Less: Net loss attributable to non-controlling interest | 165 |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | (165) |
Other comprehensive income, net of tax | 7,037 |  | 0 |  | 0 |  | 0 |  | 7,037 |  | 0 |  | 0 |
Dividends, Preferred Stock, Cash | 9,886 |  | 0 |  | 0 |  | 0 |  | 0 |  | 9,886 |  | 0 |
Dividends, Common Stock, Cash | 11,435 |  | 0 |  | 0 |  | 0 |  | 0 |  | 11,435 |  | 0 |
Stock Issued During Period, Shares, New Issues |  |  |  | 0 |  | 74 |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  | $ 302 |  | $ 0 |  | $ 74 |  | $ 228 |  | $ 0 |  | $ 0 |  | $ 0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | 2,597 |  | 0 |  | 0 |  | 2,597 |  | 0 |  | 0 |  | 0 |
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net | (2,350) |  | $ 0 |  | $ 0 |  | (2,350) |  | 0 |  | 0 |  | 0 |
Ending Balance (Shares Outstanding) at Sep. 30, 2017 |  |  | 8,400 |  | 10,613 |  |  |  |  |  |  |  |  |
Ending Balance at Sep. 30, 2017 | 694,166 |  | $ 204,759 |  | $ 10,613 |  | 119,130 |  | 40,795 |  | 318,869 |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncontrolling Interest, Decrease from Deconsolidation | (57) |  | 0 |  | 0 |  | 0 |  | 0 |  | 0 |  | (57) |
Cumulative Effect of New Accounting Principle in Period of Adoption | 498 |  | 0 |  | 0 |  | 0 |  | 27 |  | 471 |  | 0 |
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance | 708,644 |  | $ 204,759 |  | $ 10,619 |  | 118,979 |  | 51,112 |  | 323,175 |  | 0 |
Beginning Balance (Shares Outstanding) at Dec. 31, 2017 |  |  | 8,400 |  | 10,619 |  |  |  |  |  |  |  |  |
Beginning Balance at Dec. 31, 2017 | (708,146) |  | $ (204,759) |  | $ (10,619) |  | (118,979) |  | (51,085) |  | (322,704) |  | 0 |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | 85,224 |  | 0 |  | 0 |  | 0 |  | 0 |  | 85,224 |  | 0 |
Less: Net loss attributable to non-controlling interest | 0 |  |  |  |  |  |  |  |  |  |  |  |  |
Other comprehensive income, net of tax | 12,889 |  | 0 |  | 0 |  | 0 |  | 12,889 |  | 0 |  | 0 |
Dividends, Preferred Stock, Cash | 9,886 |  | 0 |  | 0 |  | 0 |  | 0 |  | 9,886 |  | 0 |
Dividends, Common Stock, Cash | 18,534 |  | 0 |  | 0 |  | 0 |  | 0 |  | 18,534 |  | 0 |
Stock Issued During Period, Shares, New Issues |  |  |  | 0 |  | 50 |  |  |  |  |  |  |  |
Stock Issued During Period, Value, New Issues |  | $ 57 |  | $ 0 |  | $ 50 |  | $ 7 |  | $ 0 |  | $ 0 |  | $ 0
Adjustments to Additional Paid in Capital, Share-based Compensation, Requisite Service Period Recognition | 1,882 |  | 0 |  | 0 |  | 1,882 |  | 0 |  | 0 |  | 0 |
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net | (2,685) |  | $ 0 |  | $ 0 |  | (2,685) |  | 0 |  | 0 |  | 0 |
Ending Balance (Shares Outstanding) at Sep. 30, 2018 |  |  | 8,400 |  | 10,669 |  |  |  |  |  |  |  |  |
Ending Balance at Sep. 30, 2018 | $ 777,591 |  | $ 204,759 |  | $ 10,669 |  | $ 118,183 |  | $ 64,001 |  | $ 379,979 |  | $ 0 |

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