Fair Value Measurement and Fair Value of Financial Instruments (Details 2) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-sale		$ 22,703
Significant Other Observable Inputs (Level 2)
Fair Value, Assets Measured on a Nonrecurring Basis
Loans held-for-sale		22,703
Non-PCI impaired loans
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	$ 61,003	70,154
Non-PCI impaired loans | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	61,003	70,154
Non-PCI impaired loans | CRE
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	10,042	14,908
Non-PCI impaired loans | CRE | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	10,042	14,908
Non-PCI impaired loans | C&I
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	47,829	52,172
Non-PCI impaired loans | C&I | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	47,829	52,172
Non-PCI impaired loans | Residential
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	2,522	2,464
Non-PCI impaired loans | Residential | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	2,522	2,464
Non-PCI impaired loans | Consumer
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	610	610
Non-PCI impaired loans | Consumer | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
Impaired loans	610	610
OREO
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	70	345
OREO | Significant Unobservable Inputs (Level 3)
Fair Value, Assets Measured on a Nonrecurring Basis
OREO	$ 70	$ 345