Operating Segments and Related Information (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($) segment	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)
Operating Segments and Related Information
Number of reportable segments | segment			3
Goodwill	$ 218,796		$ 218,796		$ 102,814
Total Assets	6,913,789		6,913,789		5,425,170
Net interest income:	55,941	$ 44,131	140,320	$ 110,025
Non-interest income:	20,837	20,745	60,913	56,168
Non-interest expense:	46,939	39,415	121,326	103,451
Income before income taxes:	28,345	23,511	77,413	58,692
Net income:	18,784	15,422	50,433	38,239
Operating segments | Banking
Operating Segments and Related Information
Goodwill	198,110		198,110		82,128
Total Assets	6,853,998		6,853,998		5,369,669
Net interest income:	57,589	44,645	143,496	111,206
Non-interest income:	12,338	12,684	33,550	31,404
Non-interest expense:	38,697	31,278	97,318	80,217
Income before income taxes:	29,736	24,102	77,234	58,343
Net income:	18,942	15,590	49,546	37,716
Operating segments | Remittance Processing
Operating Segments and Related Information
Goodwill	8,992		8,992		8,992
Total Assets	33,971		33,971		32,379
Net interest income:	15	13	44	41
Non-interest income:	3,032	2,891	9,061	8,827
Non-interest expense:	2,190	2,091	6,476	6,538
Income before income taxes:	856	813	2,629	2,330
Net income:	505	486	1,567	1,394
Operating segments | Wealth Management
Operating Segments and Related Information
Goodwill	11,694		11,694		11,694
Total Assets	29,770		29,770		28,351
Net interest income:	87	77	233	207
Non-interest income:	5,941	5,477	19,649	17,545
Non-interest expense:	3,896	5,090	11,840	12,899
Income before income taxes:	2,132	463	8,042	4,853
Net income:	1,237	284	4,760	2,902
Other
Operating Segments and Related Information
Total Assets	(3,950)		(3,950)		$ (5,229)
Net interest income:	(1,750)	(604)	(3,453)	(1,429)
Non-interest income:	(474)	(307)	(1,347)	(1,608)
Non-interest expense:	2,156	956	5,692	3,797
Income before income taxes:	(4,379)	(1,867)	(10,492)	(6,834)
Net income:	$ (1,900)	$ (938)	$ (5,440)	$ (3,773)