Share-Based Payment (Textual) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended				12 Months Ended				9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended				12 Months Ended		9 Months Ended			12 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Nov. 30, 1999	Dec. 31, 2013 Non-Employee Director Serving as Member of Audit Committee [Member]	Dec. 31, 2013 Non-Employee Director Serving as Chairman of Audit Committee [Member]	Dec. 31, 2013 Non-Employee Director Serving As Member of Nominating Committee, Compensation Committee, and Strategy and Finance Committee [Member]	Dec. 31, 2013 Non-Employee Director Serving as Chairman of Strategy and Finance Committee [Member]	Sep. 30, 2014 Directors' Deferred Compensation Plan [Member] Non-employee directors	Dec. 31, 2013 Directors' Deferred Compensation Plan [Member] Non-employee directors	Sep. 30, 2014 Directors' Deferred Compensation Plan [Member] Unaffiliated directors	Dec. 31, 2013 Directors' Deferred Compensation Plan [Member] Unaffiliated directors	Sep. 30, 2014 Directors' Deferred Compensation Plan [Member] Affiliated Director [Member]	Sep. 30, 2014 Time option 1999 Equity Plan	Sep. 30, 2014 Restricted Stock Awards	Sep. 30, 2013 Restricted Stock Awards	Dec. 31, 2013 Restricted Stock Awards	Dec. 31, 2012 Restricted Stock Awards	Sep. 30, 2014 Restricted Stock Awards Employees	Sep. 30, 2014 Restricted Stock Awards Non-employee directors	Sep. 30, 2014 Restricted Stock Awards Unaffiliated directors	Dec. 31, 2013 Restricted Stock Awards Unaffiliated directors	Sep. 30, 2014 Restricted Stock Awards Executive Management [Member]	Sep. 30, 2014 Restricted Stock Awards Board of Directors Chairman [Member]	Dec. 31, 2012 Restricted Stock Awards Cliff vest after one year	Sep. 30, 2014 Minimum	Sep. 30, 2014 Maximum
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Deferred Compensation Arrangement with Individual, Fair Value of Shares Expected To Be Issued											$ 140
Common stock shares available for options and awards (shares)	556,663			2,205,000
Options term (years)	10 years
Options, typically vesting each year from the date of grant (percent)																		33.30%
Vesting period (years)																	1 year	3 years				1 year			1 year	3 years	4 years
Options accelerated due to employment agreements vesting (shares)			0
Accelerated options vested during period (shares)	0
Subsequent stock options, vesting after one year (percent)														5.00%
Subsequent stock options, vesting after two year (percent)														20.00%
Subsequent stock options, vesting after three year (percent)														25.00%
Subsequent stock options, vesting after four year (percent)														25.00%
Subsequent stock options, vesting after five year (percent)														25.00%
Weighted average grant date fair value (dollars per share)	$ 17.56	$ 7.42
Stock options exercised (shares)	72,794	24,500
Total unrecognized fair value related to unvested stock options	1,835																		735		174
Recognized weighted-average period (years)	2 years 3 months 20 days																		2 years 4 months 21 days		3 months
Total fair value of shares vested	469	1,040
Number of awards to non-employees (shares)																			25,000	0			25,000
Share-based payment															511	390
Shares forfeited during period (shares)															26,272
Granted, unvested shares, weighted-average grant-date fair value (dollars per share)																$ 3.67			$ 30.33	$ 0.00
Common stock	525		524
Noninterest Expense Directors Fees					15	30	5	25	40	40		40
Deferred Compensation Arrangement with Individual, Fair Value of Shares Issued												40												138
Additional Noninterest Expense Directors Fees												80
Officers' Compensation													$ 140
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Market Performance Conditions, Minimum Market Price that Must be Achieved																							$ 40.00
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Market Performance Conditions, Duration of Minimum Market Price																							10 days