Goodwill and Other Intangible Assets (Additional Information) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Oct. 16, 2015
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill		$ 94,697,000	$ 95,657,000	$ 44,806,000
Goodwill, Period Increase (Decrease)	[1]		(960,000)	50,851,000
Goodwill, Impaired, Accumulated Impairment Loss		3,570,000	3,570,000	3,570,000
Goodwill, Impairment Loss, Net of Tax		0
Financial Services
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill		3,904,000	3,904,000	3,904,000
Goodwill, Period Increase (Decrease)	[1]		0
Goodwill, Impaired, Accumulated Impairment Loss		$ 3,570,000	$ 3,570,000	$ 3,570,000
SBM Financial, Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Goodwill					$ 49,891,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net					86,785,000
Scenario, Adjustment [Member] | SBM Financial, Inc. [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net					$ 960,000

[1] On October 16, 2015, the Company completed the Merger and goodwill of $49.9 million after recording a measurement-period adjustment decreasing goodwill of $960,000 in 2016 upon completion of purchase accounting. Refer to Note 2 for additional details and discussion.