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Condensed Financial Information - Parent Company Only (Statements Of Cash Flow) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Cash flows from operating activities: |  |  |  |  |  |  |
Net income | $ 2,584 | $ 3,632 | $ 4,311 | $ 4,406 | $ 14,933 | $ 15,153 | $ 14,613
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |
Depreciation |  |  |  |  | 1,551 | 1,710 | 1,629
Recognition of stock based compensation expense |  |  |  |  | 1,114 | 711 | 418
Net cash provided by operating activities |  |  |  |  | 16,791 | 20,331 | 15,531
Cash flows from investing activities: |  |  |  |  |  |  |
Additional investment in subsidiaties |  |  |  |  |  |  |
Capital expenditures |  |  |  |  | (4,296) | (1,866) | (2,002)
Net cash used in investing activities |  |  |  |  | (181,886) | (127,983) | (70,150)
Cash flows from financing activities: |  |  |  |  |  |  |
Purchases of treasury stock |  |  |  |  | (497) | (24) | (8)
Proceeds from stock option exercises |  |  |  |  | 1,570 | 1,127 | 616
Dividend paid |  |  |  |  | (6,577) | (6,040) | (5,362)
Net cash used in financing activities |  |  |  |  | 163,814 | 107,572 | 55,219
Net (decrease) increase in cash |  |  |  |  | (1,281) | (80) | 600
Cash and cash equivalents at beginning of year |  |  |  | 9,720 | 9,720 | 9,800 | 9,200
Cash and cash equivalents at end of year | 8,439 |  |  |  | 8,439 | 9,720 | 9,800
Parent Company [Member] |  |  |  |  |  |  |
Cash flows from operating activities: |  |  |  |  |  |  |
Net income |  |  |  |  | 14,933 | 15,153 | 14,613
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |
Depreciation |  |  |  |  | 1 | 1 |
Recognition of stock based compensation expense |  |  |  |  | 1,114 | 711 | 418
Net change in other assets |  |  |  |  | 38 | (281) | (189)
Net change in other liabilities |  |  |  |  | 183 | 423 | 415
Equity in undistributed earnings of subsidiaries |  |  |  |  | (10,380) | (11,272) | (10,141)
Net cash provided by operating activities |  |  |  |  | 5,889 | 4,735 | 5,116
Cash flows from investing activities: |  |  |  |  |  |  |
Capital expenditures |  |  |  |  | (1) | (1) | (1)
Net cash used in investing activities |  |  |  |  | (1) | (1) | (1)
Cash flows from financing activities: |  |  |  |  |  |  |
Purchases of treasury stock |  |  |  |  | (497) | (24) | (8)
Proceeds from stock option exercises |  |  |  |  | 1,570 | 1,127 | 616
Dividend paid |  |  |  |  | (6,577) | (6,040) | (5,362)
Net cash used in financing activities |  |  |  |  | (5,504) | (4,937) | (4,754)
Net (decrease) increase in cash |  |  |  |  | 384 | (203) | 361
Cash and cash equivalents at beginning of year |  |  |  | $ 918 | 918 | 1,121 | 760
Cash and cash equivalents at end of year | $ 1,302 |  |  |  | $ 1,302 | $ 918 | $ 1,121

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