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Other Comprehensive Income (Loss) - Reclassification of Available-for-Sale Securities to Held-to-Maturity Securities (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]
Balance, beginning balance			$ 167,498	$ 161,554
Net change	$ (1,090)	$ 1,315	1,631	(255)
Balance, ending period	175,994	167,141	175,994	167,141
Accumulated Net Gain (Loss) on Securities Transferred from Available-for-Sale to Held-to-Maturity
Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]
Balance, beginning balance	(133)	(84)	(112)	(48)
Amortization of net unrealized gains (losses)	14	(51)	(18)	(78)
Related deferred taxes	(5)	36	6	27
Net change	9	(15)	(12)	(51)
Balance, ending period	$ (124)	$ (99)	$ (124)	$ (99)

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Reclassification of Available-for-Sale Securities to Held-to-maturity Roll Forward [Roll Forward]

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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Amount before tax of reclassification adjustments of other comprehensive income (loss).

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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