Stock Based Compensation Plans (Notes)	3 Months Ended
Stock Based Compensation Plans (Notes)	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Disclosure of Compensation Related Costs, Share-based Payments	Note 13. Stock Based Compensation The Company’s 2003 Stock Incentive Plan, or the 2003 Plan, permits stock-based compensation awards to officers, directors, key employees and consultants. As of March 31, 2015, the 2003 Plan authorized grants of stock‑based compensation instruments to purchase or issue up to 19,686,565 shares of Company common stock, subject to adjustments provided by the 2003 Plan. The authorized amount includes 10,686,565 shares that were added to the 2003 Plan as a result of the CapitalSource Inc. merger. Such shares were available for grant under the former CapitalSource Inc. Equity Incentive Plan and remain available for: (a) former employees of CapitalSource Bank who remain employed with the Company, and (b) newly hired employees of the Company. As of March 31, 2015, there were 13,510,779 shares available for grant under the 2003 Plan, of which 10,082,099 shares related to those added from the CapitalSource Inc. merger. Restricted Stock At March 31, 2015, there were 1,129,445 shares of unvested time‑based restricted common stock outstanding. The awarded shares of time‑based restricted common stock vest over a service period of three to four years from the date of the grant. The time-based restricted common stock vests immediately upon the death of an employee. Compensation expense related to time‑based restricted stock awards is based on the fair value of the underlying stock on the award date and is recognized over the vesting period using the straight‑line method. Restricted stock amortization totaled $3.1 million, $2.8 million, and $1.6 million for the three months ended March 31, 2015, December 31, 2014 and March 31, 2014. Such amounts are included in "Compensation expense" on the accompanying condensed consolidated statements of earnings. The amount of unrecognized compensation expense related to all unvested restricted stock as of March 31, 2015 totaled $34.6 million.

The entire disclosure for compensation-related costs for equity-based compensation, which may include disclosure of policies, compensation plan details, allocation of equity compensation, incentive distributions, equity-based arrangements to obtain goods and services, deferred compensation arrangements, employee stock ownership plan details and employee stock purchase plan details.

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