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Parent Company Financial Information (Condensed Statements Of Income) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Condensed Financial Statements, Captions [Line Items] |  |  |
Interest expense | $ 12,541 | $ 10,137 | $ 7,281
Income before income tax benefit and equity in undistributed earnings of subsidiary | 44,141 | 38,876 | 38,980
Income tax (expense) benefit | (12,210) | (10,539) | (9,625)
Net income | 31,931 | 28,337 | 29,355
Parent Company [Member] |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Dividends from subsidiary and associated companies | 16,000 | 16,000 | 20,920
Management and service fees from subsidiary | 855 | 599 | 417
Other income | 1,296 | 1,175 | 74
Total income | 18,151 | 17,774 | 21,411
Interest expense | 2,471 | 1,750 |
Operating expenses | 5,950 | 3,509 | 3,437
Total expenses | 8,421 | 5,259 | 3,437
Income before income tax benefit and equity in undistributed earnings of subsidiary | 9,730 | 12,515 | 17,974
Income tax (expense) benefit | 2,783 | 1,814 | 1,120
Income before equity in undistributed earnings of subsidiary | 12,513 | 14,329 | 19,094
Equity in undistributed earnings of subsidiary | 19,418 | 14,008 | 10,261
Net income | $ 31,931 | $ 28,337 | $ 29,355

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