Fair Value Measurements - Valuation Techniques for Level 3 Financial Instruments (Details) - Level 3 [Member] $ in Thousands	Jun. 30, 2015 USD ($)
Assets [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 33,111
Asset-backed security [Member] | Third-Party Pricing
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	1,465
Impaired loans [Member] | Third-Party Pricing
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 31,646