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Investment Securities Available-for-Sale (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Amortized cost	$ 793,634	$ 594,386
Gross unrealized gains	2,321	1,928
Gross unrealized losses	11,816	7,046
Estimated fair value	784,139	589,268
US Agency Securities [Member]
Amortized cost	260,150	198,115
Gross unrealized gains	228	283
Gross unrealized losses	4,033	2,414
Estimated fair value	256,345	195,984
Residential Mortgage Backed Securities [Member]
Amortized cost	477,949	322,067
Gross unrealized gains	1,575	187
Gross unrealized losses	7,293	4,418
Estimated fair value	472,231	317,836
Municipal Bonds [Member]
Amortized cost	45,814	60,976
Gross unrealized gains	439	1,295
Gross unrealized losses	484	214
Estimated fair value	45,769	62,057
Corporate Bonds [Member]
Amortized cost	9,503	13,010
Gross unrealized gains	79	163
Gross unrealized losses	6
Estimated fair value	9,576	13,173
Investment Securities [Member]
Amortized cost	218	218
Estimated fair value	$ 218	$ 218

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

No definition available.

+ Details

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Balance Type:	debit
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X

- Definition

Amount before tax of unrealized gain in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563

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- Definition

Amount before tax of unrealized loss in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

+ References

No definition available.

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- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

No definition available.

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