Fair Value Measurements (Fair Value, by Balance Sheet Grouping) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Jun. 30, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	$ 289,746			$ 194,481
Investment Securities held-to-maturity, estimated fair value (in dollars)	156,454			1,342
MSRs	2,288		2,239	2,232	2,044	1,786	1,308
Interest rate swap derivatives	2,891	[1]
Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	0			0
Interest rate swap derivatives	0
Interest rate swap derivatives	0
Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	289,746			194,481
Interest rate swap derivatives	2,891
Interest rate swap derivatives	2,891
Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	0			0
Interest rate swap derivatives	0
Interest rate swap derivatives	0
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	137,282			81,849
Estimated fair value	289,746			194,481
Investment Securities held-to-maturity, estimated fair value (in dollars)	155,454			1,320
FHLB stock	25,916			9,913
Loans held-for-sale	1,839			10,359
Loans, net	1,443,452			973,618
BOLI	53,175			36,567
MSRs	2,288			2,232
Interest rate swap derivatives	2,891			0
Deposits	1,986,434			1,167,320
FHLB borrowings	0			27,000
Interest rate swap derivatives	2,891			0
Fair Value | Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents	137,282			81,849
Fair Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Estimated fair value	289,746			194,481
Investment Securities held-to-maturity, estimated fair value (in dollars)	156,454			1,342
FHLB stock	25,916			9,913
Loans held-for-sale	1,839			10,359
Interest rate swap derivatives	2,891			0
Deposits	1,987,083			1,167,532
FHLB borrowings	0			27,000
Interest rate swap derivatives	2,891			0
Fair Value | Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loans, net	1,442,479			977,142
BOLI	53,175			36,567
MSRs	$ 2,935			$ 2,790

[1] Included in Other Assets on the Consolidated Balance Sheet.