Accumulated Other Comprehensive Loss ("AOCL"), Summary of Changes (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	$ 248,980	$ 251,092
Cumulative effect of change in accounting	352	0
Balance at beginning of period, as adjusted	249,332	251,092
Other comprehensive income before reclassifications	2,341	1,349
Amounts reclassified from AOCL	(69)	(112)
Net current period other comprehensive income	2,272	1,237
Balance at end of period	255,475	239,545
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(9,108)	(6,036)
Cumulative effect of change in accounting	300
Balance at beginning of period, as adjusted	(8,808)
Balance at end of period	(6,536)	(4,799)
Unrealized Gains (Losses) on Securities Available For Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(3,310)	(238)
Cumulative effect of change in accounting	300
Balance at beginning of period, as adjusted	(3,010)
Other comprehensive income before reclassifications	2,341	1,349
Amounts reclassified from AOCL	(69)	(112)
Net current period other comprehensive income	2,272	1,237
Balance at end of period	(738)	999
Disproportionate Tax Effects from Securities Available for Sale [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance at beginning of period	(5,798)	(5,798)
Cumulative effect of change in accounting	0
Balance at beginning of period, as adjusted	(5,798)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from AOCL	0	0
Net current period other comprehensive income	0	0
Balance at end of period	$ (5,798)	$ (5,798)