Disclosures About Fair Value of Financial Instruments - Nonrecurring Basis (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Assets Measured on a Nonrecurring Basis:
Impaired loans	$ 72,950		$ 44,993
Other real estate owned	6,216		12,122
Other real estate owned, adjustment		$ 375
Level 3 [Member]
Assets Measured on a Nonrecurring Basis:
Other real estate owned	6,216		$ 12,122
Nonrecurring [Member]
Assets Measured on a Nonrecurring Basis:
Impaired loans	54,123	7,769
Impaired loans, adjustment	14,999	71
Other real estate owned		1,820
Other real estate owned, adjustment		141
Nonrecurring [Member] | Level 3 [Member]
Assets Measured on a Nonrecurring Basis:
Impaired loans	$ 54,123	7,769
Other real estate owned		$ 1,820